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I have a 40hp yamaha outboard it starts great but when i put in gear it stops

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  • 320 Answers

If it's a 2-stroke, have those carbs cleaned...
Then check if he runs on all 3 cylinders.

Posted on Sep 25, 2017

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Posted on Jan 02, 2017

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mcgyver468
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SOURCE: 40hp 1987 yamaha outboard motor will run for 30-60

Sound like the fuel pump is not keeping up with the engine's demand. Check it out. Good luck. Hope this helps.

Posted on Apr 27, 2009

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SOURCE: replace impellor in yamaha 2 cylinder 40hp

take all bolts out on foot were the two mate drop lower unit down pull impellar cover will be plastic some what roun with a short molded inlet on top when u remove impellar be sure not to lose the key way and when u put the cap on the impellar be sure to rotate it so blades will ben\d in place make sure u dont pintch them when u bolt the cover down MAKE SURE WHEN YOU PUT THE FOOT BACK ON TAT YOU LINE UP THE IMPELLAR INLET WITH THE ONE COMMING DOWN FROM THE ENGINE LINE UP YOUR SHIFTER LINKAGE (TOWARD THE TRANSOM IS WERE IT IS LOCATED bolt it up test with a hose should be good

Posted on Jun 27, 2009

  • 2 Answers

SOURCE: motor kills when put into gear

u have no spark in #2 cyl check for spark with plug if its week regap it

Posted on Jul 14, 2009

  • 677 Answers

SOURCE: Size of fuel hose

Mate.If the fuel hoes is no good,cut off about 1inch of hose and take to a hose supply shop.It will be cheaper than buying a 'real' part.Or take the whole thing.Make sure you tell them it's a fuel line to get the correct type of hose.Hope this helps

Posted on Aug 05, 2009

  • 1 Answer

SOURCE: Re-assembling lower unit of 40HP Mercury 4 stroke

I found a lower gear case assembly diagram at http://www.crowleymarine.com/mercury_parts/6995/240.cfm which helped me understand how the shift mechanism works. This clued me in to the fact that I was missing the cam follower rod which I then found I had inadvertently mopped up in a shop towel when cleaning up spilled gear oil. After that discovery, assembly and operation was quick and successful.

Posted on Nov 12, 2009

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Sound like the fuel pump is not keeping up with the engine's demand. Check it out. Good luck. Hope this helps.

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Motor kills when put into gear


u have no spark in #2 cyl check for spark with plug if its week regap it

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