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1988 Yamaha 4 wheeler slow crank

I am having a serious slow crank on my 4 wheeler.It is so severe that the 4 wheeler will not start anymore. It is a new battery. I have ruled out all electrical problems and replace the starter. I assumed that the problem was mechanical, so pulled the covers off, pulled the timing chain, and then turned the top end and bottom end manually. Neither the top end or bottom end seem to be binding. Not sure what to do from here. Any ideas?

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  • Steven Salvetti Jan 04, 2009

    I tried to start it by putting power straight to the starter, but the same thing happened. I will look further into the clutch assembly. There are 2 separate clutches on this model.

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Put jumper cables from battery to starter directly
to see if it turns over faster put red on starter lead and black on gorund(metal housing)


You may want to try this from a car battery to see if it spins faster if it does it indicates a problem with power from new battery check cables and lines for power blead

Posted on Jan 04, 2009

  • Steve Archer Jan 04, 2009

    after thinking about it It almost sounds like the clutch could be dragging



    if you have been in a lot of dirt it could be the clutch is dragging (I am assuming it is centrifugal

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