Issue with 5.5 HP evinrude fisherman

[jlrann]

Picked Up a 12ft jon boat the motor and trailer for $300, The motor ran great for 3yrs last year I had to start the motor with the throttle half open and when I cut back on the throttle to far like to an idle speed it will cut and spudder till it dies. Any suggestions. New guy here thanks in advance for your support!!!

 

[Vic.S]

Re: Issue with 5.5 HP evinrude fisherman

Probably the carb requires cleaning. That's a strip down, thorough clean and rebuild with a carb kit. Not just vaguely waving a can of carb cleaner at it.

Worth doing a compression test. The pros always recommend that

 

[F_R]

Re: Issue with 5.5 HP evinrude fisherman

So, before tearing into that carb, did you even try adjusting the slow speed (upper) mixture knob? That could be all it needs.

 

[jlrann]

Re: Issue with 5.5 HP evinrude fisherman

Would that be the knob on the front of the housing that has a dail that reads 3-5-7

 

[Vic.S]

Re: Issue with 5.5 HP evinrude fisherman

Thats the one but the knob should come off, (just pull ?) then the idle mixture can be adjusted according to the instructions in http://forums.iboats.com/showthread.php?t=167352 and the knob refitted in its midscale position

 

[dacton]

Re: Issue with 5.5 HP evinrude fisherman

Picked Up a 12ft jon boat the motor and trailer for $300, The motor ran great for 3yrs last year I had to start the motor with the throttle half open and when I cut back on the throttle to far like to an idle speed it will cut and spudder till it dies. Any suggestions. New guy here thanks in advance for your support!!!

If this is an older model with lots of hours on it you should have the crankcase bushings checked and if they are still good, new upper and lower crank seals installed. Do this before you spend a lot of money on it. The bushings are not easily replaced as they are part of the crankcase. Do the simple carb adjustments first as suggested. I am not sure if you can do a crankcase pressure and vacuum test.

 

[jlrann]

Re: Issue with 5.5 HP evinrude fisherman

UPDATE!!!
I found a small crack in the out fuel line, went ahead and replaced all lines. also adjusted the slow speed mixture knob, its running better than the day I purchased it. Thanks to everyone.