F9.9 CMH 2008 Yamaha Ticking noise.

w2much

Lieutenant
Joined
Jun 22, 2005
Messages
1,276
This occurred to me today. The bulb lit. I thought of something. Usually I assume the answer or look it up or ask in theses forums. As the motor warms up I get a ticking from what I have assumed was the valve lash or to do with the rocker assembly or at least valve related. I thought to take off the valve cover and adjust as usual but then the above happened. I thought outside my regular pie. I loosened the fuel pump screws thinking (uh oh) that for as many times as I have done valve adjustments , sometimes with success and sometimes not so much. Can the fuel pump be making the noises I am hearing. It seems there was a marked difference in the sound when the fuel pump screws are loosened. I know the pump rides on a cam, , then there are the flapping leaf type valves in the pump. Has anyone found the fuel pump to be the issue , not a valve adjustment .to be the cause of the noises we take for granted as being valve related ? I appreciate your replies. Thanks
 

Prophammer

Chief Petty Officer
Joined
Jul 2, 2010
Messages
466
when is the ticking the worst? under load? at idle? neutral, forward or reverse? does it change when you speed up ?
 

w2much

Lieutenant
Joined
Jun 22, 2005
Messages
1,276
I would have to say at idle, the longer it idles. Really I have not used it under load . Its a test barrel runner which I planto sell.
 
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