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  #1  
Old 09-06-2010, 04:24 PM
jadilla jadilla is offline
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Default Engine Slipping when trying to put in Forward

Hey guys,

This is my first post on 247... but my question is about my 1986 johnson 40 hp VRO. It have been running excellent for four years but recently I have been having problems with the engine slipping when it is going into gear. It slips for about a fifth of the throttle then slams into gear. I have no problems with it in reverse. Im 21 and do all my own maintenance on my boat so could somebody give me an idea of what it might be and i will tear her down.

Thanks for any help!
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Old 09-07-2010, 01:39 PM
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rjcappy rjcappy is offline
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Default Re: Engine Slipping when trying to put in Forward

I would check the throttle cables first. Hopefully it's not the lower unit. Don't tear anything down untill the mechanics chime in!
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Old 09-07-2010, 03:10 PM
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Roccus Roccus is offline
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Default Re: Engine Slipping when trying to put in Forward

Several things could be at play here...

first remove the cowl and watch the throw of the shift lever, if it appears to be "normal" remove the shift cable and shift it by hand... if it is the lower unit, the problem will persist...

if the problem is gone I would then check the control box for play, there is a posibility the shift cam is worn.... it is posible that the cable has a loose crimp and is moving internally... that can only be confirmimed when you diagnose the control box, either way, at that stage you will have to take apart the box to replace the cable or replace/repair the box...

also check the engine idle speed, to high of an idle can cause a similar problem...
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