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2005 Yamaha Raptor - Wont Start Consistantly

sglass

By sglass
in Yamaha ATV Forum

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sglass Rookie

sglass

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My 2005 raptor 350 will not start consistantly, and even harder to start when its warm. When it does start it purrs like a kitten. When it does start it starts right away, very seldomly do you have to crank it over for a few seconds to get it to start. Ive confirmed spark,new spark plug, had my carb gone through and float adjusted and had the valves adjusted with still no consistancy. Only other guess is CDI,Starter relay..... Any help would be greatly appriciated.

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GREENIE Proficient

GREENIE

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you might have a bad batch of gas, i just had issues with my step sons raptor 350. it would run then wouldn t start. cleaned the tank and carb out . then it would run a couple days then not start. finally got fed up and took it to a shop and it did the same thing for him . finally he figured out that the gas was bad. if the gas sits too long the gas and ethalol separates and sometimes you might end up with all ethanol. try putting new gas in it and make sure you put the ethanol treatment in it. its about $20 a bottle but it worth it. i havn t had a problem with it since.

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sglass Rookie

sglass

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Tried everything you all suggested and no leads : ( Even when warm I have spark, but it lead me to wonder. There is spark but how do I know if its enough of a spark. How can I confirm there is enough spark to create ignition?

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marioweldinginc Veteran

marioweldinginc

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Tried everything you all suggested and no leads : ( Even when warm I have spark, but it lead me to wonder. There is spark but how do I know if its enough of a spark. How can I confirm there is enough spark to create ignition?

I know they have spark gap testers for regular autos but i dont see why it cant work on atvs. They usually have them at autoparts stores. It has a screw on one side and you adjust the gap to a preset level according to the instructions. If it wont fire then the spark is weak.

Sent from my SGH-T959V using Xparent Blue Tapatalk 2

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