• Troubleshooting • Glow plugs are items that will need to be replaced on a regular basis to maintain maximum performance. When your engine will not start this should be the first thing to be checked or replaced. The glow plug may also be the problem if your engine just seems to be running poorly. You may also check to see it the glow plug is leaking. Look for bubbles at the base of the glow plug. Tighten the glow plug, if problem still persists, replace glow plug with new. The only true way to see if your glow plug is bad is to replace with new. Checking by putting into glow heater to see if it lights is good to see if your heater is working, it may not show that a plug is fouled. Usually if the first few coils don't light up the plug is bad. If the plug doesn't glow bright orange, your glow heater may need to be charged. When installing new glow plug, loosen plug using a 5/16-inch wrench. Be careful not to get any dirt inside the engine. Look for the copper gasket, don't loose this, may be needed if new plug didn't come with one. Replacement glow plugs are available from your local hobby shop. Your engine came with a standard short, cold plug. Do not use plugs with idle bars. Nitro Fuel. Many problems occur when using low quality fuels. Many times we get cars to tune and just by putting good quality fuel in them they run perfectly. During break-in period you will be using a lot of fuel. This is because of the "rich" settings that are required for this process. When your car/boat is running out of fuel, the fuel/air mixture will lean out radically. Because of this you should avoid letting the engine rev up to high R.P.Ms. This could foul the glow plug, and create un-necessary over heating of the engine. Always be sure to keep the cap on your fuel bottle tight! If you leave the cap of the bottle even for a few days you should dispose of the entire bottle of fuel. This is because one of the major components of the fuel is methanol. Methanol will attract moisture from the air and suck it into your fuel if left in contact with air. Uncapped fuel will also get dust and other containments in it that will harm you engine. Keep the fuel out of direct sunlight. Poor quality fuels will create a number of different problems for your engine. There are brands of fuel that do not use pure nitro methane. They use a low cost blend of nitro methane and nitro propane. If your fuel is not a blend of both castor and high quality oil, its high recommended that you do not use it. Simply put, cheap fuel will cause a lot of problems that will make your experience a bad one. You MUST use a fuel that meets the guidelines listed above to assure a good running engine. Be sure to use a nitro content between 10-20%. The higher the nitro content, the hotter the engine will run. Usually its best to use lower nitro% in warn weather and higher in cold. Always check the fuel lines for cracks or splits at the fittings on the tank and the carburetors. These cracks or splits will allow air to enter the line, which will lean the fuel/air mixture. If you think you may have any problems with the fuel lines replace with new. Flooding. It is easy to accidentally flood the engine. If you find the pull starter difficult to pull that is a symptom of the engine being flooded. To get the excess fuel out of the engine remove the glow plug, hold engine upside down and pull the started a few times. The gas will drip out, and then retighten the glow plug and retry. Carburetor. The carburetor is one of the simplest components on the engine. It controls how the engine will run and how reliable it is going to be. Because of the importantes of the carburetor, you must always make sure to keep it clean. Dirt is its worst enemy; always clean any dirt that you see on it, especially around the air intake. If your air filter becomes dirty and you can't wash it always replace with new. If you are getting a lot of dirt or debris in your fuel tank you may want to install a fuel filter in the intake line. These are available at your local hobby shop. Fuel mixture. This is the only way you can adjust how your engine will run. There are many factors that can result in your engine not running perfectly. Fuel, ambient temperature, and humidity all affect the way the engines going to run. If one day your engine runs strong, then the next day it's really humid and cold then you may need to make adjustments to the fuel mixture. This is a normal thing to expect with all nitro engines. • Pull Starter Problems • Almost all starter problems are due to pulling the cord out too far. Other things that cause failure of pull starter are, pulling the cord when the engine if flooded, and pulling the cord like it's a lawnmower. Your car/boat is not a lawnmower and should not be treated as one. Do not pull and let go of the cord, this could snap the handle off the cord, or damage the spring inside. *Make sure to hold the engine, not the hull when starting your boat or PWC. • Cooling Problems • Overheating is one of the most damaging things that can be done to a nitro engine. Many things can cause it, poor air flow, mixture set to "lean", towing or climbing for long periods of time, ECT. If your engine overheats, stop the engine and let it cool down. Next look at what might be the reason for the over heating. First check to see if you have good air flow through the engine cooling head. The user should always cut out a big hole in the windshield in front and in back of the engine head. The driver side window is a good idea too. • Clutch Bells • The clutch bell gear on your car will wear from use and should be check regularly for excessive wear. When the teeth are worn to a point, they need to be replaced. Check the spur gear for signs of wear when replacing the clutch bell gear. • Mechanical Precautions • Your engine is a high performance engine that can tune over 30,000 R.P.Ms at full throttle. If your engine is ran at high R.P.Ms for a continuous amount of time, your internal engine parts will be damaged and the overall life of the engine will be reduced. If you are running the engine at high speeds, expect to replace engine parts more often. Never run the engine with out the air filter. Replace or clean if dirty. Always check air filter when refueling tank. If missing, shut engine off and replace. When car is upside down, don't rev the engine. If car is upside down too long it will stall. Do not over-rev the engine. Only give throttle when wheels are on the ground. Allowing the engine to run out of fuel while at high R.P.Ms can foul the glow plug. Test the radio system before operating each time. Always make sure to use strong batteries. If you notice slow servos are any low voltage light on your radio come on stop using and replace batteries. Do not drive your car in thick grass or in soft sand. This could lead to the engine overheating. Your engine is not waterproof! Running your model in water will damage your electronics and your engine. The starter cord should not be pulled out more than 8 inches. Longer pulls will only damage the spring inside the recoil. Do not buy fuel if you are unsure of the contents. Try to avoid unknown names or brands. These may be cheaper, but may not have the required contents and end up damaging your engine. For the most part- all major brands should contain the correct oil contents. Break-in the engine using the same percentage of nitro that you expect to use engine. • Quick Reference Chart • Description of Problem Cause of Problem Solution of Problem Engine will not start Out of fuel Fill tank with fuel   Wrong type or poor quality fuel Replace fuel   Carburetor not primed Prime carburetor   Glow heater not charged Charge glow heater   Bad glow plug Replace glow plug   Engine flooded See flooding   Engine too hot Allow engine to cool   Carburetor set incorrectly Re-adjust carburetor   Blocked exhaust Clean or remove debris from exhaust system   Air filter clogged Remove and clean air filter Starter will not retract Broken spring Replace recoil assembly Starter hard to pull Engine is flooded See flooding   Engine is seized or locked up Take engine apart Engine starts then stalls Idle set too low Increase idle speed   Bad glow plug Replace with new   Low-speed mixture too "rich" "Lean" low-speed mixture   Low fuel tank pressure Check for blockage in fuel pressure line   Engine overheated Allow engine to cool down Engine sluggish or poor performance High-speed mixture set to "rich" Lean out high-speed mixture   Leaking glow plug Tighten or replace glow plug   Bad glow plug Replace glow plug   Old or dirty fuel Replace with new fuel   Carburetor dirty or blocked Clean carburetor, check for blockage   Engine overheating Stop running and richen fuel mixture   Slipper clutch set too loose Tighten slipper clutch   Tires not glued/wheel pins fell out Glue tires/replace wheel pins   Engine overgeared Use lower gearing   Bound up drive train Check drive train, and make it free   Engine worn out Replace piston/sleeve and check connecting rod Engine overheating High-speed mixture too lean Richen high-speed mixture (counter-clockwise)   Cooling air flow is blocked Cut holes in body to allow air to flow   Nitro content too high Run nitro content between 10-20%   Fuel not containing correct lubricants Purchase a higher quality fuel   Excessive load on the engine Check for bound up drive train   Low-speed mixture too lean Richen low-speed mixture For boats only Clogged cooling head Check water cooled head for clogging Engine stutters or hesitates High or low-speed mixture too lean Richen high first then low   Engine overheated Stop engine and let it cool down   Bad glow plug Replace with new Engine stall as soon as you give it gas Bad glow plug Replace with new   Low-speed mixture too lean Richen low-speed mixture   High-speed too rich Lean high-speed mixture Engine stalls when I let go of throttle Idle set too low Increase idle Engine stalls for no apparent reason Bad glow plug Replace with new   Engine overheated Shut off and let cool down, richen high-speed   Debris in fuel line Remove and retry   Poor fuel tank pressure Check hose for clogging

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