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Old 20 October 2011, 10:22   #1
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neutral throttle revs

yamaha 50hp 4 stroke,starts ok everytime revs at tickover once engine is warm are 800rpm (correct as per manual).During the warm up phase (3minutes as per manual)the use of the neutral throttle lever does not cause any increase in revs.The revs are measured by the tacho.Would anybody know why the lever is not increasing revs and what the revs should rise to using the lever during warm up.?Thanks in advance for info.
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Old 20 October 2011, 10:50   #2
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Often the fast idle lever gives very little response until right at it's full lift. Are you giving it full increase ?

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007
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Old 20 October 2011, 15:28   #3
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Quote:
During the warm up phase (3minutes as per manual)the use of the neutral throttle lever does not cause any increase in revs
does it cause an increase in revs when beyond the warm up period??
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Old 20 October 2011, 16:35   #4
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cable incorrectly adjusted
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Old 20 October 2011, 18:10   #5
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Quote:
Originally Posted by Boats&Outboards View Post
Often the fast idle lever gives very little response until right at it's full lift. Are you giving it full increase ?

Peter ~ Boatsandoutboards4sale ~ askboatsandoutboards4sale@sky.com ~ 07930 421007
Yes,lever is at the end of its travel.
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Old 20 October 2011, 18:11   #6
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Originally Posted by wavelength View Post
does it cause an increase in revs when beyond the warm up period??
No.it does not have any effect at any time
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Old 20 October 2011, 18:15   #7
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cable disconnected or incorrectly adjusted.
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Old 20 October 2011, 18:42   #8
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hi Furby
you will deed to remove the engine cover and find the throttle cable lever, work back from there and you will find a clip holding the cable outer, release the clip and there will be an adjustable piece there, if you pull the cable adjuster out of its holder you will be able to turn the adjuster you will need to turn half a dozen times moving it towards the end of the cable, refit and try without starting the engine, look and see if it moves the carb lever, it doesn't need to move far at all.
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Old 20 October 2011, 18:57   #9
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Carb or EFi?
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Old 21 October 2011, 10:01   #10
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How old are the remotes? Mine (granted, probably on its 20-ish-th birthday) needed all the nylon bushes replaced.

The throttle response on both levers was markedly improved after that.....

Checking the cable first is probably easier tho'!
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