This term designates a collection of replacement parts intended for the restoration of a specific engine component. This component is responsible for mixing air and fuel in the correct ratio for internal combustion engines, specifically those found in the Suzuki Quadrunner 250 all-terrain vehicle. The included parts typically address common wear and tear issues within the fuel delivery system.
The utilization of such a collection of parts offers several key advantages. It provides a cost-effective alternative to replacing the entire unit, extending the lifespan of the engine. Furthermore, using this type of kit can restore optimal engine performance, improving fuel efficiency and overall reliability. Historically, these kits became popular as a practical solution for maintaining older vehicles and equipment, allowing owners to repair and preserve their investments.
The following sections will provide a more detailed examination of the components found within this type of kit, discuss common issues requiring its use, and outline the general procedure for its installation. This aims to deliver a comprehensive understanding of the restoration process and its significance.
1. Component identification
A mechanic stood hunched over the disassembled heart of a Quadrunner 250, a puzzle of brass and rubber spread before him. The arrival of a fuel delivery system restoration package, a neatly packaged promise of renewed life, did little to ease his furrowed brow. He understood the theory, the principles of combustion and fuel mixture, but the practical execution hinged on a more fundamental skill: component identification. Without accurately discerning the jets from the needles, the gaskets from the O-rings, the entire endeavor was destined for failure. The small diagram included in the kit was helpful, but years of grime and wear had obscured the markings on the original parts. One wrong placement, one incorrect seal, could render the entire engine useless. He remembered a previous attempt, a similar task on a different machine, where a misplaced fuel screw resulted in a sputtering, unresponsive engine, a testament to the importance of knowing each piece and its designated role.
Consider the main jet, a seemingly insignificant brass fitting. It dictates the amount of fuel delivered at high throttle settings. Misidentify it with a smaller or larger jet, and the Quadrunner would either starve for fuel at high speeds, leading to a loss of power, or run excessively rich, fouling the spark plug and emitting black smoke. A real-world instance: a farmer, attempting the restoration himself, inadvertently swapped the pilot jet with the main jet. The consequence was a machine that idled beautifully but stalled under any acceleration. Only after consulting a detailed parts diagram and meticulously comparing each component was the error discovered and rectified. This example underscores the critical need for accurate differentiation of the pieces, regardless of experience level.
Therefore, component identification is not merely a step in the restoration process; it is the foundation upon which the entire operation rests. The challenges of deciphering worn parts, the potential for costly errors, and the reliance on accurate diagrams highlight the importance of meticulous observation and careful comparison. Only through a thorough understanding of each component’s identity and purpose can the promise of the fuel delivery system restoration be realized, breathing new life into the Quadrunner 250 and ensuring its continued functionality for years to come.
2. Metering precision
Within the intricate workings of the Suzuki Quadrunner 250, metering precision stands as the unseen hand guiding the engine’s performance. A properly restored fuel delivery system, aided by a rebuild collection of parts, hinges on its ability to deliver the exact fuel-to-air ratio demanded by the engine at any given moment. Deviation from this precision results in a cascade of problems, from sluggish acceleration to complete engine failure. The restoration process, therefore, is not merely about replacing worn components; it is about restoring the original, finely-tuned balance of the fuel delivery system, a task where even minuscule errors can have significant consequences.
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Jet Size Calibration
The jets within the fuel delivery system serve as calibrated orifices, each designed to allow a specific amount of fuel to pass through at different engine speeds and loads. A restoration collection of parts typically includes replacement jets, but their effectiveness depends entirely on their accuracy. An incorrect jet size, even by a fraction of a millimeter, can disrupt the fuel-air mixture. For example, if the main jet is too small, the engine will run lean at high speeds, leading to overheating and potential piston damage. Conversely, an oversized main jet will cause the engine to run rich, resulting in poor fuel economy and fouled spark plugs. The restoration process must ensure that the jets are not only clean and unobstructed but also precisely calibrated to the original specifications of the Quadrunner 250’s engine.
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Needle and Seat Alignment
The needle and seat work in tandem to control the flow of fuel into the float bowl, maintaining a constant fuel level. The needle, a tapered valve, rises and falls with the float, regulating the fuel supply. If the needle is worn or the seat is damaged, the fuel level can fluctuate wildly, causing inconsistent fuel delivery. A fuel delivery system restoration collection of parts will include a replacement needle and seat, but their proper alignment and seating are critical. An improperly seated needle can allow fuel to continuously flow into the bowl, leading to flooding and a non-starting engine. The restoration process requires careful inspection and adjustment to ensure that the needle and seat create a tight seal, maintaining a stable fuel level and consistent metering.
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Air-Fuel Screw Adjustment
The air-fuel screw allows for fine-tuning of the fuel-air mixture at idle and low speeds. Its position directly affects the amount of air that mixes with the fuel, influencing the engine’s smoothness and responsiveness. A poorly adjusted air-fuel screw can cause a rough idle, stalling, and poor acceleration. A restoration collection of parts does not always include a new air-fuel screw, but the existing screw must be carefully cleaned and adjusted after the restoration process. A common scenario involves overtightening the screw, damaging its delicate tip and hindering its ability to precisely regulate the air-fuel mixture. The restoration process requires patience and a keen ear to achieve the optimal setting, balancing fuel economy and engine performance.
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Float Height Accuracy
The float, a hollow plastic or brass component, sits in the fuel bowl and controls the fuel level by actuating the needle valve. The float height determines the amount of fuel in the bowl and, consequently, the fuel-air mixture. An incorrect float height can lead to either a lean or rich condition, depending on whether the fuel level is too low or too high. A restoration collection of parts may include a new float, but its height must be precisely adjusted according to the Quadrunner 250’s specifications. Even a slight deviation from the recommended height can have a noticeable impact on engine performance. The restoration process necessitates careful measurement and adjustment, using specialized tools if necessary, to ensure that the float operates within the prescribed range.
In conclusion, the success of a fuel delivery system restoration hinges not only on the replacement of worn parts, but also on the meticulous attention paid to metering precision. The correct calibration of jets, the proper alignment of the needle and seat, the careful adjustment of the air-fuel screw, and the accurate setting of the float height all contribute to the engine’s ability to deliver the correct fuel-air mixture at all times. Neglecting any of these aspects can negate the benefits of the restoration and leave the Quadrunner 250 with subpar performance, highlighting the vital role of precision in the restoration process.
3. Seal integrity
Seal integrity, in the context of the restoration of a fuel delivery system, is the unseen guardian against the insidious forces of fuel leakage and air infiltration. The meticulous selection of replacement pieces for the Suzuki Quadrunner 250 aims to breathe new life into an aging system. However, without secure, impermeable barriers preventing unwanted fluid and gas exchange, the restoration effort becomes a Sisyphean task. The system operates on finely tuned pressure differentials; compromised seals undermine this balance, leading to a cascade of performance issues and potential mechanical damage.
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Float Bowl Gasket Deterioration
Consider the float bowl gasket, a thin ring of rubber or cork nestled between the fuel bowl and the main body of the system. Its purpose is deceptively simple: to prevent fuel from seeping out of the bowl. Over time, however, this gasket is subjected to the corrosive effects of gasoline, fluctuating temperatures, and constant compression. It hardens, cracks, and loses its elasticity, creating pathways for fuel to escape. In one documented case, a Quadrunner 250, recently declared “restored” by an inexperienced mechanic, was left parked overnight. The following morning, a pool of gasoline lay beneath the machine, a clear indication of a failed float bowl gasket. The loss of fuel not only presented a fire hazard but also prevented the engine from starting, effectively negating the restoration effort. The inclusion of a high-quality float bowl gasket in the components is therefore not merely a formality but a crucial defense against fuel leakage.
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O-Ring Hardening and Cracking
O-rings, small circular seals, are ubiquitous within the intricate passages of the fuel delivery system. They seal fuel screws, passages, and other critical junctions. Their composition, typically a type of synthetic rubber, is designed to withstand prolonged exposure to fuel. However, aging and exposure to contaminants can cause these O-rings to harden, crack, and lose their ability to form a tight seal. Imagine a scenario where an O-ring sealing the fuel screw has deteriorated. The resulting air leak would lean out the fuel mixture, causing the engine to run erratically, particularly at idle. This would manifest as a sputtering engine, difficulty starting, and a general lack of responsiveness. A diligent restoration, mindful of the potential for O-ring failure, includes a complete set of replacements, ensuring that every potential leakage point is addressed.
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Intake Manifold Seal Leaks
The intake manifold connects the fuel system to the engine’s cylinder head, providing the pathway for the air-fuel mixture to enter the combustion chamber. The seal between the intake manifold and the cylinder head is critical for maintaining proper vacuum. Over time, this seal can degrade, allowing air to leak into the system. This “vacuum leak” disrupts the fuel-air ratio, causing the engine to run lean. A common symptom is a high idle speed, as the engine attempts to compensate for the additional air. This situation is exacerbated by the fact that the leak is often intermittent, making diagnosis difficult. The conscientious restorer will carefully inspect and replace the intake manifold seal, ensuring a tight connection and preventing unwanted air infiltration.
The implications of compromised seal integrity extend beyond mere inconvenience. Fuel leaks pose a significant safety hazard, increasing the risk of fire and environmental contamination. Air leaks, while less immediately dangerous, degrade engine performance, reduce fuel efficiency, and can ultimately lead to engine damage. The presence of high-quality seals within the collection of restoration components is therefore a testament to the manufacturer’s commitment to restoring not only the function but also the safety and reliability of the Suzuki Quadrunner 250. It is a recognition that the restoration process is not simply about replacing parts; it is about re-establishing the fundamental integrity of the system, ensuring years of dependable service.
4. Float calibration
The wind whispered through tall grass as a seasoned mechanic, Elias, stood beside a disassembled Quadrunner 250. The machine, a faithful companion through countless seasons, now lay dormant, its spirit dampened by a persistent fuel delivery issue. A shiny collection of parts lay nearbya promise encapsulated within the Suzuki Quadrunner 250 restoration. Yet, Elias knew that merely replacing the components would not suffice. The restoration’s success hinged on a critical, often overlooked detail: float calibration.
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The Silent Guardian of Fuel Level
The float, a seemingly simple component, acts as the sentinel of the fuel bowl. Its purpose: to maintain a consistent fuel level, ensuring the engine receives the precise fuel-air mixture it demands. A brass or plastic buoy, the float’s position dictates the opening and closing of the needle valve, the gateway to the fuel supply. A Quadrunner with an improperly calibrated float is akin to a ship sailing with a faulty compass, destined for misdirection.
Elias recalled a time when a neighboring farmer, impatient with a sluggish engine, had hastily installed a restoration without calibrating the float. The result: a machine that ran rich, spewing black smoke and wasting fuel, a testament to the importance of precision.
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The Balance Between Rich and Lean
Float calibration is a delicate balancing act, a quest to find the sweet spot between a fuel-rich and fuel-lean condition. Too high a fuel level, and the engine drowns in excess fuel, resulting in poor performance and fouled plugs. Too low a level, and the engine starves, leading to overheating and potential damage. This is where skill and experience truly meet.
Elias remembered a particularly challenging restoration where the original float had been slightly deformed. He spent hours, using a specialized gauge and meticulous adjustments, to achieve the perfect height, ensuring the engine ran smoothly and efficiently. He explained that the float doesn’t simply float aimlessly; it’s part of a complex system that relies on precise adjustments.
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The Tools of Precision
The tools of float calibration are simple yet demanding: a precise gauge, steady hands, and a discerning eye. Measuring the distance from the float bowl gasket surface to the top of the float, the mechanic seeks to align the float with the manufacturer’s specifications. A slight bend of the float tab, a minute adjustment, can make all the difference. It is this meticulous attention to detail that separates a competent repair from a true restoration.
It’s necessary to remember that a restoration isn’t just about replacing parts, but about understanding the intricate mechanics of the whole engine, Elias would often say.
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The Symphony of a Smooth Engine
When the float is properly calibrated, the engine sings a symphony of smooth, responsive power. Acceleration is crisp, fuel economy is optimized, and the Quadrunner once again becomes a reliable workhorse. This harmonious performance is the reward for patience, precision, and a deep understanding of the fuel delivery system. It is the embodiment of a successful restoration, a testament to the transformative power of float calibration. Elias often compared a well-tuned fuel delivery system to a fine-tuned instrument. One wrong note can throw the whole thing off.
Elias picked up his tools, his brow furrowed in concentration. He understood that the Suzuki Quadrunner 250 restoration collection of parts was merely a starting point. The true magic lay in the careful execution, the meticulous attention to detail, and the unwavering commitment to restoring the machine to its former glory. The fate of the Quadrunner, its future adventures and labors, rested on the precision of his hands and the accuracy of his float calibration.
5. Air-fuel ratio
The air-fuel ratio is the lifeblood of any internal combustion engine, including the one powering the Suzuki Quadrunner 250. It represents the precise balance between air and fuel necessary for efficient combustion. When this balance is disrupted, the engine’s performance suffers, potentially leading to damage. The goal of any carburetor rebuild, especially one utilizing a restoration kit, is ultimately to restore and maintain this crucial ratio. Consider a Quadrunner sputtering and struggling to climb a hill. The likely culprit isn’t simply old parts; it’s an air-fuel ratio thrown out of whack by worn jets, leaky seals, or a malfunctioning float, all components addressed within a rebuild kit.
The connection is direct and causal. The restoration components within a kit address the very parts responsible for maintaining the air-fuel ratio. New jets ensure accurate fuel metering, replacing those enlarged by wear or clogged by deposits. Fresh gaskets and O-rings prevent air leaks that lean out the mixture. A properly functioning float, correctly calibrated, guarantees a consistent fuel level in the bowl, providing a steady supply to the jets. Without these components working in harmony, achieving the optimal air-fuel ratio is impossible. Imagine a mechanic meticulously replacing every part of the fuel delivery system, only to neglect the calibration of the float. The result would be a machine that still runs poorly, a testament to the interconnectedness of the system and the importance of each element within the kit contributing to the ultimate goal.
Therefore, understanding the air-fuel ratio and how the different components of the rebuild kit affect it is paramount. The act of rebuilding the system is not merely about installing new parts; it’s about restoring the engine’s ability to breathe and burn fuel efficiently. The challenges are many, requiring precision, knowledge, and a keen understanding of how each piece influences the whole. By focusing on the air-fuel ratio as the ultimate measure of success, the Quadrunner’s restoration transforms from a simple repair into a comprehensive rejuvenation, ensuring its continued performance and reliability for years to come.
6. Engine performance
The wind howled across the plains, mirroring the frustration etched on old Jedediah’s face. His Suzuki Quadrunner 250, a faithful workhorse for decades, now sputtered and coughed, barely capable of hauling supplies across his sprawling ranch. The engine, once a source of reliable power, was now a liability, threatening to strand him miles from civilization. He suspected the fuel delivery system, a labyrinth of passages and precisely calibrated jets, was the culprit. Memories surfaced of previous attempts to coax life back into the engine, temporary fixes that soon succumbed to the ravages of time and wear.
Jedediah knew the answer lay in a comprehensive restoration. He procured a “suzuki quadrunner 250 carburetor rebuild kit,” a carefully curated collection of components designed to breathe new life into the aging fuel delivery system. The kit, more than just spare parts, was a promise of restored engine performance, a chance to resurrect the Quadrunner’s lost power and reliability. He understood that each element within the kit played a vital role in the intricate ballet of air and fuel that fueled the engine’s combustion. New jets would ensure precise fuel metering, replacing those worn by years of use. Fresh gaskets would seal against leaks, preventing the intrusion of unwanted air. A properly calibrated float would maintain a consistent fuel level, ensuring a steady supply to the engine. He’d seen too many shortcut repairs that resulted in damaged cylinder head, engine knocking, or a broken piston. He knew the importance of doing the job right from the get go.
Weeks later, Jedediah stood beside the resurrected Quadrunner, its engine purring with newfound vigor. He revved the engine, the sound echoing across the plains, a testament to the transformative power of the restoration kit. The sputtering and coughing were gone, replaced by a smooth, responsive surge of power. He knew then that the “suzuki quadrunner 250 carburetor rebuild kit” wasn’t just a collection of parts; it was a key to unlocking the Quadrunner’s potential, a gateway to restored engine performance and continued service on the vast ranch. The wind, still howling, now carried a different tone, a melody of triumph, as Jedediah set off, the Quadrunner once again his reliable partner in the endless cycle of ranch life.His engine was running at peak engine performance.
Frequently Asked Questions
The following questions address common inquiries and concerns surrounding the restoration of a fuel delivery system for the Suzuki Quadrunner 250, focusing on the crucial role of restoration components and their impact on overall engine performance.
Question 1: Is a complete fuel delivery system replacement always preferable to using a restoration kit?
A mechanic, weary from years of wrenching, once faced this very dilemma. A customer, eager to restore his Quadrunner, insisted on a complete replacement, convinced it was the only path to guaranteed success. The mechanic, however, knew better. He understood that the original system, if properly restored, could often outperform a cheaper, aftermarket replacement. The decision hinged on a careful assessment of the existing system’s condition. If the main body of the system was undamaged and the wear was limited to replaceable components, a restoration kit offered a cost-effective and reliable solution. Complete replacement only became necessary when the system was severely damaged or corroded beyond repair.
Question 2: Can a novice successfully install a restoration kit, or is professional assistance required?
Stories abound of ambitious enthusiasts attempting this task, with varying degrees of success. One tale involves a determined weekend warrior who, armed with a repair manual and a YouTube tutorial, confidently disassembled his fuel delivery system. He soon found himself overwhelmed by the sheer number of small parts and the intricacies of the system. After days of frustration, he reluctantly sought professional assistance, admitting that the task was far more complex than he had anticipated. While a skilled and methodical individual can certainly perform the restoration, it requires a solid understanding of engine mechanics, the ability to follow detailed instructions, and access to specialized tools. Novices should proceed with caution, recognizing the potential for costly errors and the value of seeking expert guidance.
Question 3: Are all restoration kits created equal, or does the quality of the kit matter?
A seasoned parts supplier once remarked, “You get what you pay for.” He recounted instances where customers, lured by the promise of low prices, purchased inferior kits containing poorly manufactured components. These kits often lacked essential parts, used substandard materials, and suffered from inaccurate jet sizing. The result was invariably a poorly running engine and a frustrated customer. A high-quality restoration kit, on the other hand, contains precisely machined jets, durable gaskets made from fuel-resistant materials, and comprehensive instructions. Investing in a reputable brand, known for its commitment to quality, is essential for a successful and long-lasting restoration.
Question 4: What are the most common mistakes made during the restoration process?
A veteran mechanic, wise from years of observing both successes and failures, identified several recurring errors. Overtightening screws, leading to stripped threads and damaged components, topped the list. Neglecting to thoroughly clean the system body, allowing residual dirt and debris to clog the newly installed jets, was another frequent mistake. Perhaps the most common error, however, was failing to properly adjust the float height, resulting in an imbalanced fuel-air mixture and poor engine performance. Avoiding these pitfalls requires patience, attention to detail, and a willingness to follow instructions meticulously.
Question 5: How can the restored fuel delivery system be maintained to ensure long-term performance?
Once the restoration is complete, diligent maintenance becomes crucial for preserving the engine’s newfound performance. Regular cleaning of the air filter prevents dirt and debris from entering the fuel delivery system. Using high-quality fuel and fuel stabilizers minimizes the buildup of deposits in the jets and passages. Periodic inspections for leaks and wear ensure that minor problems are addressed before they escalate into major issues. A proactive approach to maintenance, combined with careful riding habits, will extend the life of the restored fuel delivery system and keep the Quadrunner running smoothly for years to come.
Question 6: What are the telltale signs that a Quadrunner 250’s fuel delivery system requires restoration?
One seasoned Quadrunner owner described the symptoms with chilling accuracy: “A sluggish engine, a hesitant throttle, and a general lack of get-up-and-go.” He explained that these were often accompanied by other telltale signs, such as difficulty starting, a rough idle, and poor fuel economy. Black smoke emitting from the exhaust indicates a fuel-rich condition, while a lean condition may manifest as overheating and a tendency to stall. These symptoms, when considered together, paint a clear picture of a fuel delivery system in need of attention. Addressing these issues promptly, before they lead to more serious engine damage, is essential for preserving the Quadrunner’s long-term reliability.
By understanding these frequently asked questions, owners can approach the fuel delivery system restoration process with greater confidence and a clearer understanding of the challenges and rewards involved.
The next section will focus on specific troubleshooting techniques for common issues encountered after a fuel delivery system restoration.
Restoring the Suzuki Quadrunner 250
The restoration of a Quadrunner’s fuel delivery system is not merely a mechanical task; it’s a preservation of its spirit, especially when completed via use of a suzuki quadrunner 250 carburetor rebuild kit. These tips aid in transforming the machine from a neglected relic to a reliable asset.
Tip 1: Trace the Lineage. Before even opening the kit, meticulously document the original setup. Draw diagrams, take photographs, labeling each component. This visual roadmap is invaluable if confusion arises. Consider the tale of the mechanic who, in haste, failed to record the original jet placement. The result was an engine that sputtered and coughed, requiring hours of painstaking trial and error to rectify.
Tip 2: Cleanliness is Paramount. Every crevice, every passage must be free of debris. A single speck of dirt can obstruct a jet, rendering the entire effort futile. Imagine a surgeon preparing for a delicate operation the same level of sterility applies here. Use compressed air, specialized solvents, and brushes to ensure pristine conditions.
Tip 3: Embrace Patience. The system restoration is a meticulous process, not a race against the clock. Rushing through steps can lead to mistakes, causing more harm than good. Recall the anecdote of the novice mechanic who, in his eagerness, stripped the threads of a critical screw. The ensuing repair cost him both time and money.
Tip 4: Prioritize Genuine Components. While aftermarket options may seem appealing due to their lower price, the compromised quality often proves detrimental. Inferior gaskets can leak, poorly manufactured jets can disrupt the fuel-air mixture, and the Suzuki Quadrunner 250’s performance pays the price. Invest in genuine or reputable aftermarket components to ensure lasting reliability. High quality components in the suzuki quadrunner 250 carburetor rebuild kit gives you a peace of mind.
Tip 5: Seek Wisdom When Needed. There is no shame in admitting a lack of expertise. If encountering difficulties, consult a seasoned mechanic or refer to detailed repair manuals. The arrogance of assuming knowledge can lead to costly mistakes. Remember the old adage: “A fool learns from his own mistakes, a wise man learns from others.”
Tip 6: Calibration is Key. Replacing components is only half the battle. Proper float height adjustment and fuel screw calibration are crucial for optimizing engine performance. Neglecting these steps can result in a poorly running engine, negating the benefits of the rebuild.
Tip 7: Document Your Work. After the restoration, maintain a detailed record of the work performed, including part numbers and calibration settings. This information will prove invaluable for future maintenance and troubleshooting. It serves as a testament to the effort invested in restoring the machine’s performance.
These suggestions are not mere guidelines; they are hard-earned lessons distilled from years of experience. Adhering to these principles increases the likelihood of a successful fuel delivery system restoration.
The proper restoration not only revives a machine’s utility, but also celebrates its history, therefore the application of a suzuki quadrunner 250 carburetor rebuild kit can be one of the best method to accomplish this.
The Enduring Legacy of Restoration
The narrative surrounding the Suzuki Quadrunner 250 and the restoration centers around the revitalization of a vital engine component. It emphasizes precision, understanding, and unwavering dedication. Components, meticulously selected and installed, represent more than mere replacement parts. They embody the promise of sustained performance and the extension of the machine’s service life, a testament to thoughtful repair.
As the Quadrunner finds itself once more on the trail, the fruits of labor become manifest and the engine roars back to life with each well timed combustion. The fuel delivery system can carry on its mission, a reminder that even age can be countered with care, knowledge, and a commitment to meticulous restoration. The suzuki quadrunner 250 carburetor rebuild kit is essential to carrying on the Quadrunner’s story.
