4 hp yamaha troubles

[tm]

Hello, I'm new to this, but i'm having trouble with my 86' 4hp motor. It will only idle at 1/2 choke; the choke has to be all the way off in order to run at full throttle; and it will only start on full choke. The plug looks as though it is fouled. What should I do? Is there a cleaner I can put in the gas, or how do I know if I need to rebuild the carb?

 

[JB]

Re: 4 hp yamaha troubles

Howdy, TM.<br /><br />Do you have a low speed mixture adjustment? If so back it out about a turn, then turn it in enough to get your engine to idle smoothly without choke after it is warmed up.<br /><br />If you have no adjustment of low speed mixture, you need to clean the jets in your carb. <br /><br />Get a manual before you start.<br /><br />Good luck.

 

[tm]

Re: 4 hp yamaha troubles

Thanks Jb, Is it very hard to do and roughly how much should it cost? Any idea at all?

 

[JB]

Re: 4 hp yamaha troubles

With a manual it is a little scary the first time. After that it is a snap.<br /><br />Good luck.