runs in barrel and crap on the lake? help

salmonite

Petty Officer 2nd Class
Joined
Mar 28, 2008
Messages
166
so i have a 1990 6hp evinrude that runs like a dam dream in a barrel and then when i get it out on lake will only run at high rpms. it is the same combo of gas tank, hose and motor. I just dont understand? Kind of stumped... Thoughts?
 

Cofe

Lieutenant Commander
Joined
Apr 23, 2009
Messages
1,883
Re: runs in barrel and crap on the lake? help

When you are out to the lake, try backing the low speed needle out a little to enrich the idle mixture.
 

oldrudedude

Chief Petty Officer
Joined
Jul 3, 2008
Messages
480
Re: runs in barrel and crap on the lake? help

How about advancing the timing at idle a little? Have you done a proper link/synch? Is the level of the fuel tank the same in the boat as in the barrel? Is this motor new to you? If not how did it run before?
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Re: runs in barrel and crap on the lake? help

It's electrical. Check the coils and wires thoroughly. It sounds like you have a coil arcing out on the mag plate.
 

salmonite

Petty Officer 2nd Class
Joined
Mar 28, 2008
Messages
166
Re: runs in barrel and crap on the lake? help

How about advancing the timing at idle a little? Have you done a proper link/synch? Is the level of the fuel tank the same in the boat as in the barrel? Is this motor new to you? If not how did it run before?

no not new to me... started doing it last year, ran pretty darn good before. I guess i probably have not done a "proper link/synch" as i would say i am at best a mediocre mechanic...
 

jtexas

Fleet Admiral
Joined
Oct 13, 2003
Messages
8,646
Re: runs in barrel and crap on the lake? help

can't remember...does this motor have a submerged exhaust? If I'm right and it doesn't, then could it be that the boat is floating lower in the water for some reason? Added a battery in the stern, bigger gas tank, gained some weight over the winter, different boat, yada yada yada
 

salmonite

Petty Officer 2nd Class
Joined
Mar 28, 2008
Messages
166
Re: runs in barrel and crap on the lake? help

can't remember...does this motor have a submerged exhaust? If I'm right and it doesn't, then could it be that the boat is floating lower in the water for some reason? Added a battery in the stern, bigger gas tank, gained some weight over the winter, different boat, yada yada yada

It actually is a different boat but it started doing it on my old boat and then its doing it on the new one. Could it really be its sitting to low in water? Somebody else told me that
 
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