Johnson 40 Horse Problem

07-30-04, 02:36 AM

I have a friend who has a mysterious outboard problem that the local guy can't figure out. I thought maybe someone on here has seen this problem.
Motor starts fine, idles fine, and runs perfect up to exactly 2500 rpms then the motor jerks around like an anchor rope is rapped around the prop.

Anyone?

BassNva · 07-30-04, 08:46 AM

maybe he has an anchor rope wrapped around the prop ???

jeffman · 07-30-04, 09:49 AM

LANCE,

Take it to a different mechanic with the diagnostic equipment to find the problem.
It could be in the carburetor or fuel pump, it could be in the computer or ignition. It is hard to diagnose the problem without having the motor right here.
First guess would be a plugged high speed jet in the carb.

JackL

07-31-04, 01:23 AM

I used the boat again tonight, and it worked perfect.
Maybe someone cut the anchor rope, or it might have been the water mocassin I found in the splash well.
Still very much alive, but maybe a little dizzy from going round and round.

More importantly, we caught fish. Thanks for the help so far.

catfishtonyd · 07-31-04, 07:50 AM

Maybe a slug of water in the gas?

Rob Mak · 08-01-04, 11:55 AM

been there done that try this carbon build up in the moter head to get it out ya must tear open the head also run a fuel additive-johnson still made in canada anit they?

i had the same problem with my yammy

zooker

07-30-04, 02:36 AM	#1
Guest Guest Posts: n/a	Johnson 40 Horse Problem I have a friend who has a mysterious outboard problem that the local guy can't figure out. I thought maybe someone on here has seen this problem. Motor starts fine, idles fine, and runs perfect up to exactly 2500 rpms then the motor jerks around like an anchor rope is rapped around the prop. Anyone?

07-30-04, 08:46 AM	#2
BassNva BassFishin.Com Member Join Date: Mar 2004 Location: Posts: 0	Re: Johnson 40 Horse Problem maybe he has an anchor rope wrapped around the prop ???

07-30-04, 09:49 AM	#3
jeffman BassFishin.Com Member Join Date: Jun 2004 Location: Posts: 0	Re: Johnson 40 Horse Problem LANCE, Take it to a different mechanic with the diagnostic equipment to find the problem. It could be in the carburetor or fuel pump, it could be in the computer or ignition. It is hard to diagnose the problem without having the motor right here. First guess would be a plugged high speed jet in the carb. JackL

07-31-04, 01:23 AM	#4
Guest Guest Posts: n/a	Re: Johnson 40 Horse Problem I used the boat again tonight, and it worked perfect. Maybe someone cut the anchor rope, or it might have been the water mocassin I found in the splash well. Still very much alive, but maybe a little dizzy from going round and round. More importantly, we caught fish. Thanks for the help so far.

07-31-04, 07:50 AM	#5
catfishtonyd BassFishin.Com Member Join Date: May 2002 Location: Posts: 0	Re: Johnson 40 Horse Problem Maybe a slug of water in the gas?

08-01-04, 11:55 AM	#6
Rob Mak BassFishin.Com Member Join Date: Jul 2005 Location: Rochester, New York Posts: 19	Re: Johnson 40 Horse Problem been there done that try this carbon build up in the moter head to get it out ya must tear open the head also run a fuel additive-johnson still made in canada anit they? i had the same problem with my yammy zooker __________________ there ain't no such thing as a bad day of fishin SUPPORT OUR TROOPS US ARMY Rochester, New York

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