Troy-Bilt 5550 Generator: A Comprehensive Guide
This guide provides detailed instructions for safe operation, maintenance, and troubleshooting of your Troy-Bilt 5550 portable generator, ensuring reliable power․
The Troy-Bilt 5550 generator is a robust and reliable source of portable power, designed for a variety of applications․ From camping and tailgating to emergency home backup during power outages, this generator offers convenience and peace of mind․ It boasts a 5550 starting watt and 4000 running watt output, capable of powering essential appliances and tools․
This generator features a durable OHV engine, providing efficient and consistent performance․ Its compact design and integrated handle make it relatively easy to transport․ Understanding its features and following proper operating procedures, as outlined in this manual, will maximize its lifespan and ensure safe operation․ Proper maintenance is key to unlocking the full potential of your Troy-Bilt 5550․

Safety Precautions & Warnings
Generators present significant safety risks if not operated correctly․ Always read and understand this entire manual before using the Troy-Bilt 5550․ Operate the generator only outdoors in a well-ventilated area, far away from living spaces․ Never operate it inside a home, garage, or any enclosed structure – this can lead to fatal carbon monoxide poisoning․
Electrical hazards are also present․ Avoid contact with wet surfaces and never operate the generator in rain․ Use properly grounded extension cords of the correct gauge for the connected load․ Fuel is highly flammable; store it in approved containers and away from heat sources․ Disconnect all appliances before refueling․ Ignoring these warnings can result in severe injury or death․
Carbon Monoxide Hazards
Carbon monoxide (CO) is a colorless, odorless gas that can be deadly․ Your Troy-Bilt 5550 generator produces CO during operation․ Never operate this generator indoors, in partially enclosed spaces like garages, or near windows and doors․ Even with ventilation, CO can accumulate to dangerous levels․
Install battery-operated or battery backup CO alarms in your home․ Symptoms of CO poisoning include headache, dizziness, weakness, nausea, vomiting, chest pain, and confusion․ If anyone experiences these symptoms, immediately move them to fresh air and seek medical attention․ Regular maintenance of the generator can help minimize CO emissions, but it doesn’t eliminate the risk․ Prioritize safety!
Electrical Safety Guidelines
Always inspect power cords for damage before connecting appliances to the Troy-Bilt 5550 generator․ Damaged cords pose a serious shock hazard․ Use heavy-duty, outdoor-rated extension cords of the correct gauge for the amperage draw of the connected devices․ Avoid overloading the generator; calculate wattage needs carefully (see section on Load Capacity)․
Never attempt to modify the generator’s wiring or grounding system․ Grounding the generator is crucial for safety․ Keep the generator dry, protecting it from rain and moisture to prevent electrical shock․ Do not touch the generator with wet hands․ If using a transfer switch, ensure it’s professionally installed and meets local electrical codes․ Prioritize electrical safety at all times․

Fuel Handling & Storage Safety
Always refuel the Troy-Bilt 5550 generator in a well-ventilated area, away from open flames, sparks, or hot surfaces․ Allow the generator to cool completely before refueling to prevent fire hazards․ Use a funnel to avoid spills, and wipe up any spilled fuel immediately․ Store gasoline in an approved, tightly sealed container, clearly labeled, and away from living areas․

Never smoke or use open flames near fuel․ Keep fuel containers out of reach of children․ Do not store fuel for extended periods; gasoline can degrade over time․ Consider using a fuel stabilizer to prolong its usability․ Adhere to all local regulations regarding fuel storage․ Proper fuel handling is paramount for safe operation․

Generator Components & Features
The Troy-Bilt 5550 generator boasts a robust design focused on portability and power․ Key components include a powerful 270cc OHV 4-stroke engine, delivering consistent performance․ The unit features a user-friendly control panel with multiple outlets for connecting various devices․ A durable frame provides stability during operation, while the compact design facilitates easy transport․
Notable features encompass a low-oil shutdown system, protecting the engine from damage, and a cast iron tube cage for enhanced durability․ The generator also includes a recoil starter for manual starting and is equipped with a large fuel tank for extended runtimes․ Understanding these components ensures optimal usage․
Engine Overview
The Troy-Bilt 5550 generator is powered by a reliable 270cc, single-cylinder, four-stroke OHV engine․ This engine is specifically designed for generator applications, prioritizing fuel efficiency and consistent power output․ Air cooling ensures optimal operating temperatures, even during prolonged use․ The engine utilizes a recoil starter for convenient manual starting, alongside automatic voltage regulation (AVR) for stable electricity․
Key engine specifications include a displacement of 270cc, a continuous rating of 4000 watts, and a peak rating of 5500 watts․ Regular maintenance, such as oil changes and air filter cleaning, is crucial for maintaining peak engine performance and extending its lifespan․ Always refer to the maintenance schedule for optimal results․
Control Panel Breakdown
The Troy-Bilt 5550 generator’s control panel is intuitively designed for ease of use․ Key components include the power switch, which controls the generator’s on/off function, and the circuit breakers, protecting against overloads․ You’ll find multiple AC outlets – typically including 120V and potentially a 12V DC outlet for charging batteries․
An hour meter tracks runtime for maintenance scheduling․ The control panel also houses the engine shut-off switch, used in emergencies․ Indicator lights signal power output and potential issues․ Familiarize yourself with each control before operation․ Proper understanding of the control panel ensures safe and efficient generator use, maximizing its functionality․
Key Parts Identification (Recoil Starter, Fuel Tank, etc․)
Let’s identify crucial components of your Troy-Bilt 5550 generator․ The recoil starter, a pull-cord mechanism, initiates engine combustion․ The fuel tank, clearly labeled, stores gasoline – always use the recommended fuel type․ Locate the oil fill cap and dipstick for level checks․ The air filter housing protects the engine from debris․
The exhaust port directs fumes away from the operator – never operate indoors! Identify the spark plug location for inspection and replacement․ The control panel, discussed previously, manages power output․ Finally, the low-oil shutoff sensor prevents engine damage․ Knowing these parts aids in maintenance and troubleshooting․
Getting Started: Pre-Operation Checks
Before each use, thorough pre-operation checks are vital for safe and efficient generator performance․ Always begin by visually inspecting the generator for any loose parts or damage․ Confirm the oil level is correct using the dipstick – low oil can cause severe engine damage․ Next, check the fuel level, ensuring sufficient gasoline for your intended runtime․
Inspect the air filter for cleanliness; a dirty filter restricts airflow․ Verify the spark plug wire is securely connected․ Finally, ensure the generator is placed on a stable, level surface in a well-ventilated area․ These simple checks prevent potential issues and prolong the life of your Troy-Bilt 5550․
Oil Level Check & Refilling
Maintaining the correct oil level is crucial for engine longevity․ Before each use, and after every 25 hours of operation, check the oil level․ Locate the dipstick, typically yellow or orange, and wipe it clean․ Reinsert the dipstick fully, then remove it again to read the oil level․ The oil should be between the “Min” and “Max” marks․
If the oil is low, use the recommended oil type – SAE 10W-30 – to refill․ Slowly add oil, checking the level frequently to avoid overfilling․ Do not use automotive oil containing detergents, as it can damage the generator’s engine․ Properly dispose of used oil according to local regulations․
Fuel Level Check & Refilling (Recommended Fuel Type)
Always check the fuel level before starting the generator․ The Troy-Bilt 5550 requires fresh, unleaded gasoline with a minimum octane rating of 87․ Avoid using gasoline blends containing ethanol exceeding 10%, as this can cause engine damage․ To check the fuel level, visually inspect the fuel tank – do not open the cap while the engine is running or hot․
When refueling, use a funnel to prevent spills and ensure the area is well-ventilated․ Do not overfill the tank; leave some space for expansion․ Store gasoline in an approved container, away from heat sources and open flames․ Never mix oil with gasoline․

Spark Plug Inspection
Regular spark plug inspection is crucial for optimal generator performance․ Before each use, or at least every 25 hours of operation, disconnect the spark plug wire and carefully remove the spark plug using a spark plug wrench․ Inspect the electrode for wear, carbon buildup, or fouling․
A healthy spark plug should have a tan or light gray color․ If it’s excessively black, oily, or shows signs of damage, replace it with a new spark plug of the correct type – typically a Champion RJ19LM․ Ensure the gap is set correctly (refer to the specifications section) before re-installing․ Tighten securely, but avoid over-tightening․

Starting the Generator
Before attempting to start the Troy-Bilt 5550 generator, ensure all safety precautions have been followed and pre-operation checks are complete․ Verify sufficient oil and fuel levels, and that the generator is placed on a level surface in a well-ventilated area․
The starting process differs slightly depending on whether the engine is cold or warm․ A cold start requires engaging the choke lever, while a warm start typically doesn’t․ Always begin by turning the fuel valve to the ‘ON’ position․ Then, slowly pull the recoil starter handle until resistance is felt, and pull briskly to initiate the engine․
Cold Start Procedure
For a cold start on your Troy-Bilt 5550 generator, begin by ensuring the fuel valve is in the ‘ON’ position․ Next, firmly press and hold the choke lever to the ‘CLOSED’ or ‘START’ position – this enriches the fuel mixture for easier ignition in cold conditions․
Slowly pull the recoil starter handle until you feel resistance, indicating the compression stroke․ Then, using a brisk, steady pull, engage the starter․ Avoid rapid, jerky pulls․ If the engine doesn’t start after a few attempts, repeat the process․ Once the engine sputters and attempts to run, gradually open the choke lever to allow for normal operation․
Warm Start Procedure
When starting a warm Troy-Bilt 5550 generator, the procedure differs slightly from a cold start․ Begin by verifying the fuel valve is set to the ‘ON’ position․ Unlike a cold start, the choke lever should generally remain in the ‘OPEN’ or ‘RUN’ position, as the engine retains some heat and fuel vapor․
Gently pull the recoil starter handle until you feel resistance from the compression stroke․ Then, with a smooth, firm pull, initiate the engine․ Avoid using the choke unless the engine struggles to start; excessive choking can flood the engine․ If it doesn’t start immediately, try again without the choke․
Troubleshooting Starting Issues

If your Troy-Bilt 5550 generator fails to start, several factors could be at play․ First, ensure sufficient fuel is in the tank and the fuel valve is open․ Check the spark plug – a fouled or damaged plug won’t ignite the fuel․ Verify the oil level is within the acceptable range; the low-oil shutoff prevents starting․
A flooded engine is common; if you suspect this, allow the spark plug to dry․ Also, inspect the air filter for obstructions․ If the recoil starter feels loose or unresponsive, there might be an issue with the starter mechanism itself․ Finally, confirm the kill switch is in the ‘RUN’ position․
Operating the Generator
Before connecting any appliances, ensure the generator is placed on a level surface in a well-ventilated area, away from flammable materials․ Always start the generator before connecting loads․ Begin with smaller appliances first, gradually increasing the load to avoid overloading․
Pay close attention to the generator’s wattage capacity; exceeding it can cause damage․ Regularly monitor the connected load to stay within the rated output․ Avoid using extension cords whenever possible, and if necessary, use heavy-duty, outdoor-rated cords of the appropriate gauge․ Never attempt to modify the generator’s output voltage or frequency․
Connecting Appliances & Devices
Always ensure appliances are in good working order and properly grounded before connecting them to the Troy-Bilt 5550 generator․ Use the appropriate outlets – 120V for standard household items and 120/240V for larger appliances if supported․ Avoid “daisy-chaining” extension cords, as this reduces voltage and can overheat the cords․
Sensitive electronics, like computers and televisions, require clean power․ Consider using a surge protector to safeguard against voltage fluctuations․ Never connect the generator directly to a building’s electrical system without a properly installed transfer switch; this prevents backfeeding onto the power grid, a dangerous situation․
Generator Load Capacity & Wattage Calculation
The Troy-Bilt 5550 generator boasts a running wattage of 4500 watts and a peak wattage of 5550 watts․ Understanding these figures is crucial for safe operation․ To calculate the total wattage needed, add up the wattage requirements of all appliances you intend to power simultaneously․ Remember to account for starting wattage, which is often higher than running wattage for motors․
Avoid exceeding the generator’s capacity․ Overloading can damage both the generator and connected appliances․ A good rule of thumb is to stay below 80% of the running wattage for continuous use․ Prioritize essential appliances and stagger starting times to manage the load effectively․
Running Time & Fuel Consumption
The Troy-Bilt 5550 generator, with its 7․9-liter fuel tank, offers an approximate running time of up to 12 hours at a 25% load․ However, actual runtime varies significantly based on the connected load․ Higher loads will drastically reduce running time, while lighter loads extend it․
Fuel consumption is approximately 0․95 gallons per hour at a 50% load․ Always use fresh, unleaded gasoline with a minimum octane rating of 87․ Regularly check the fuel level and avoid running the generator completely dry, as this can cause carburetor issues․ Monitor fuel usage to plan for refills during extended outages․
Generator Maintenance

Regular maintenance is crucial for ensuring the longevity and optimal performance of your Troy-Bilt 5550 generator․ Consistent upkeep prevents costly repairs and guarantees reliable power when you need it most․ Following a scheduled maintenance plan is highly recommended․
Key maintenance tasks include routine oil changes (every 50 hours of operation or annually), air filter cleaning or replacement (depending on usage environment), and spark plug inspection/replacement (every 100 hours or annually)․ Always disconnect the spark plug wire before performing any maintenance․ Keep the generator clean and free of debris․
Oil Change Procedure
To change the oil on your Troy-Bilt 5550 generator, first, warm up the engine for a few minutes to allow the oil to flow more freely․ Then, shut off the engine and disconnect the spark plug wire for safety․ Locate the oil drain plug beneath the engine and place a suitable oil drain pan underneath․

Remove the drain plug and allow all the old oil to drain completely․ Once drained, reinstall the plug securely․ Next, remove the oil fill cap and add the recommended amount of new oil (refer to the specifications section)․ Check the oil level with the dipstick, ensuring it’s within the acceptable range․ Properly dispose of the used oil at a designated recycling center․
Air Filter Cleaning & Replacement
Maintaining a clean air filter is crucial for optimal engine performance․ To clean the air filter, first, locate the air filter housing on the generator․ Open the housing and carefully remove the air filter element․ If the filter is only dusty, gently tap it to remove loose debris, or use compressed air – blowing from the inside out․
For heavily soiled filters, wash it with mild detergent and water, ensuring it’s completely dry before reinstalling․ If the filter is damaged or excessively dirty, it must be replaced․ Install a new, genuine Troy-Bilt air filter, ensuring a proper seal within the housing․ Regularly inspect and service the air filter for consistent operation․
Spark Plug Replacement Schedule
Consistent spark plug performance is vital for reliable generator starting and efficient operation․ Troy-Bilt recommends replacing the spark plug after every 100 hours of use, or annually, whichever comes first․ However, more frequent replacement may be necessary in dusty or harsh operating conditions․
Inspect the spark plug every 25 hours for signs of fouling, wear, or damage․ A properly functioning spark plug should have a clean, light tan or gray color․ Use only the recommended spark plug type specified in the engine specifications section of this manual․ Always ensure the spark plug gap is correct before installation for optimal ignition․
Troubleshooting Common Problems
Encountering issues with your Troy-Bilt 5550 generator is sometimes unavoidable, but many problems are easily resolved․ This section addresses frequent concerns․ If the generator fails to start, verify fuel levels, check the spark plug, and ensure the engine switch is in the ‘on’ position․ Overloading, indicated by tripping, requires reducing connected appliance wattage․
Low power output often stems from a dirty air filter or incorrect fuel mixture․ Always disconnect appliances before troubleshooting․ Never attempt repairs beyond your skill level; consult a qualified technician․ Refer to the detailed sections for specific solutions to each issue, prioritizing safety at all times․
Generator Won’t Start
If your Troy-Bilt 5550 generator refuses to start, systematically check several key components․ First, confirm sufficient fuel in the tank and that the fuel valve is open․ Next, inspect the spark plug – it should be clean and properly gapped․ A fouled or damaged spark plug will prevent ignition․ Ensure the engine switch is set to ‘on’ and the choke is appropriately positioned (full choke for cold starts)․
Verify the oil level is within the acceptable range; a low oil sensor will prevent starting․ Finally, attempt a recoil start, ensuring a firm, steady pull․ If it still fails, check the safety shut-off switch․ Consult a technician if these steps don’t resolve the issue․
Generator Overloads & Trips
Frequent tripping or overloading indicates you’re exceeding the Troy-Bilt 5550’s wattage capacity․ This generator features a circuit breaker designed to protect itself and connected appliances․ Before connecting devices, calculate their total running wattage and ensure it’s significantly below the generator’s rated output (5500 peak watts, 4000 running watts)․
Starting wattage for appliances with motors is often higher than running wattage – account for this surge․ If tripping persists with seemingly adequate wattage, check for faulty appliances drawing excessive current․ Reset the circuit breaker after disconnecting the overload․ Repeated tripping signals a potential issue; consult a qualified technician․
Low Power Output Issues
Reduced power output from your Troy-Bilt 5550 can stem from several causes․ First, verify the generator isn’t overloaded – see the ‘Generator Overloads & Trips’ section․ A dirty air filter restricts airflow, diminishing engine performance and wattage․ Inspect and clean or replace it as needed․ Low oil levels trigger a safety shutdown; ensure proper oil levels are maintained․
Old or contaminated fuel can also cause power loss․ Drain and replace with fresh, recommended fuel․ A failing spark plug weakens combustion, reducing output․ Inspect and replace if necessary․ If issues persist, a carburetor problem might exist, requiring professional servicing․
Storage & Winterization
Proper storage is crucial for maintaining your Troy-Bilt 5550 generator’s longevity․ Before long-term storage, drain all fuel from the tank and carburetor to prevent gumming and damage․ Run the generator for a few minutes after draining to ensure the carburetor is completely empty․ Add fuel stabilizer to any remaining fuel if immediate draining isn’t possible․
Change the oil before storage, and disconnect the spark plug wire for safety․ Store the generator in a clean, dry, and well-ventilated area․ Cover it to protect from dust and debris․ For winterization, consider a battery tender if equipped, and inspect all components for corrosion before the next use․