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2001 Yamaha 115 Motor Ticking

G

Gumman

New member
I have had a bad ticking for a while now on my 115. I have read that it could be full pump related but I hace changed the pump, fuel filters, primed the bulb multiple times and has not been solved. Looking for any feedback or suggestions. I have included a video for reference. Thanks!

 
That looks to be a four stroke F115. How many hours?

Which fuel pump? Mechanical or electric?

You should be able to hold the handle of a screw driver to your ear while placing the tip of the driver on the mechanical pump to verify if that is the source of the noise.
 
boscoe said:
That looks to be a four stroke F115. How many hours?

Which fuel pump? Mechanical or electric?

You should be able to hold the handle of a screw driver to your ear while placing the tip of the driver on the mechanical pump to verify if that is the source of the noise.
Click to expand...
Yes, correct. It is a 4 Stroke LF115. Approximately 900 Hours.

It is a mechancial fuel pump. Part# 68V-24410-00-00. The motor has the lever on the cam shaft that hits the pump to activate it.

And yes, good tip. I have already used a screw driver around the motor and the sound is loudest on the pump. I have replaced the pump already thinking that was the solution. However, no change. I am wondering if the noise is coming from the cam shaft or is related to that lever on the motor.

Thanks for the reply!
 
racerone said:
I would say that is a knock , not a tick.
Click to expand...
Could vary well be, trying to diagnose this to repair. Do you have any idea what could be knocking? Piston rod, Cams? Just looking to some direction on what to investigate further. I was thinking on taking the valve cover off and inspecting the top end as a next step.
 
You might want to try removing the mechanical oil pump, block the opening with a rag, and then start and run the motor. See if the noise changes.
 
racerone said:
Start motor at idle.----Pull one plug wire off at a time.---Note if tick / knock changes.
Click to expand...
I did this yesterday and no change in the noise. When cyl 1 plug wire was removed the engine did sputter but when I did cyl 2, 3 and 4 not much happened. This has me thinking cyl 2,3,4 are also low on power as well. I have done a compression test a few weeks ago and I remember cyl 2 and 3 were quite low. Perhaps it's a valve issue or piston ring problem?
 
Absolute nonsense----Do not run with oil pump disconnected.-----And I do not believe that this procedure is even possible.
 
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