Boggs out at half throddle and above?

[Rob 1]

I have a 1983 75 hp Evinrude. I recently rebuilt the carbs. It runs great at low throddle. When I go past mid throddle and beyond it acts like it not getting enough fuel.When I go full throddle and push in the primer on the controls it runs like a champ. Do you think this is a bad fuel pump? Is this a common problem?

 

[hunt-fish.com]

Re: Boggs out at half throddle and above?

I had a problem similar on my 115 Johnson. Turned out to be air leaking in the fuel line between the tank and the motor. I replaced the fuel line with the primer bulb between the tank and the motor and it fixed it. I think it was about $15 at WalMart for the pre-fabbed setup. I have also had problems with the plastic hose clamps on the fuel lines in the motor. Check all of them for leaks. I noticed gas dripping out of them while the engine was running. I have used both zip ties and metal hose clams to fix those. I prefer the old style metal hose clamps.

John

 

[dsinger]

Re: Boggs out at half throddle and above?

New fuel lines and use real hose clamps. It sounds like an air leak since you choke it and it runs good. Rebuild the fuel pump

 

[tashasdaddy]

Re: Boggs out at half throddle and above?

i think you have dirty high speed jets. carb cleaning and rebuild with a new kit and float.

 

[itstippy]

Re: Boggs out at half throddle and above?

All good advice. DON"T run it around until you get it running right. You could burn it up. It's so tempting to just take the boat out and run a tank of gas through it so see if it clears itself up. No! No!