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Doesn’t want to run unless choke is applied?

02 Yamaha G16A

Freshly overhauled engine. Now it may idle a bit but the quits, will not gain rpm unless choke is applied. Air filter, gas lines and carburetor are all new or cleaned. What else do I need to look at?

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Dwight Coleman there are usually only a few possibilities if it only runs with the choke. One cause could be an air leak on the carb, head gasket, crankshaft seal. The other could be a clogged low speed and idle circuit. Since you just got the engine done I would double check the carburetor. You do want to make sure that it is set right and that it is clean. Check everything properly again and check for airleaks....

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Dwight check for a leak around the base of the carb . Make sure the gasket seated properly and that its torqued down properly. Use a propane torch to check for vacuum leaks around the carb . Don't light it just turn on the gas and move it slowly around the seams of the carb with the motor running . When the motor speeds up you found your leak. Hope this helps

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