75 hp Evinrude carburetor flooding problem

[nobletig]

I have a 1983 75hp evinrude outboard 3 cylinder model# E75TRLCTE. When the motor runs out of water and hooked to a hose, it runs and idles great. When I put the boat in the lake, the motor starts strong and idles great. When I advance the throttle forward to fast the motor bogs down and wants to die at about half throttle. If I back off the throttle and slowly throttle down the motor it will push through to top speed (30-35 mph) and it will run great at top speed. If I hit the choke when the motor is bogging down it makes it worse. After running the motor I see fuel coming out of the air intake of all 3 carburetors. Also, after running the motor you can see black fuel running down the side of the motor leaking from somewhere. I strongly believe that motor is choking itself out but I'm not sure how or why. I don?t know if it has something to deal with the timing advancing forward to so? I have had the carburetors completely rebuilt twice in the last year by to different mechanics and I have replaced everything that has to deal with the fuel system: tanks, fuel line, fuel bulbs, fuel pump, electric choke, etc. Can anyone help me on this problem? I am all out of Ideas and money.

 

[Big flop]

Re: 75 hp Evinrude carburetor flooding problem

Did you take the air box cover off to see if fuel is coming out
from one or more carbs?

 

[Redfish2000]

Re: 75 hp Evinrude carburetor flooding problem

I have a 1983 75hp evinrude outboard 3 cylinder model# E75TRLCTE. When the motor runs out of water and hooked to a hose, it runs and idles great. When I put the boat in the lake, the motor starts strong and idles great. When I advance the throttle forward to fast the motor bogs down and wants to die at about half throttle. If I back off the throttle and slowly throttle down the motor it will push through to top speed (30-35 mph) and it will run great at top speed. If I hit the choke when the motor is bogging down it makes it worse. After running the motor I see fuel coming out of the air intake of all 3 carburetors. Also, after running the motor you can see black fuel running down the side of the motor leaking from somewhere. I strongly believe that motor is choking itself out but I'm not sure how or why. I don?t know if it has something to deal with the timing advancing forward to so? I have had the carburetors completely rebuilt twice in the last year by to different mechanics and I have replaced everything that has to deal with the fuel system: tanks, fuel line, fuel bulbs, fuel pump, electric choke, etc. Can anyone help me on this problem? I am all out of Ideas and money.

I have a similar problem with a 2000 175. I found that the fuel pump was leaking and running down the inside of the engine covers and coming out the outside. It needed a gasket. The fuel pump was located in the center of the front of the engine. I pumped the fuel bulb after removing the engine cover and saw the fuel coming out(spray) of the back of this square reservior that the fule pump has. I hope this is your problem.

 

[nobletig]

Re: 75 hp Evinrude carburetor flooding problem

To answer your question, yes. All three carburetors have the same puddled fuel on the bottom of the intake. After running the motor I could see this black color fluid running down the side of the motor. It smelt like fuel. I wanted to know where it was coming from. When I removed the motor cover I could see what looked like clean fuel on the bottom of the housing. The fluid lead me back to the air cover. I could see fuel dripping out the bottom of the cover. When I removed the cover I could see fuel puddled on the bottom of the carburetor intake. To me, it seems like the motor is getting to much fuel at throttle. When at idle the motor runs strong with very little smoking and I see no fuel coming out the carburetors. When I put the motor into gear it almost wants to die. But as you push the throttle forward the motor picks up and starts to accelerate. When you get to about half throttle the motor drops in rpm and starts to sputter. If you pull back on the throttle and slowly advance the throttle the motor will slowly start to accelerate and get to top speed. At top speed it runs great. No missing or sputtering. The timing advance on the motor seems to run smooth at acceleration. Every part of the fuel system is new and I have done all of the proper fuel system tests to make sure there are no air leaks. I strongly believe the fuel system is good. I?m not sure about the timing or the carburetors?

 

[Big flop]

Re: 75 hp Evinrude carburetor flooding problem

With carb cover off pump primer bulb very hard to see if you can
Flood carbs. If it won't then run it with cover off and watch
To see where the gas is coming from. If it's a flooding carb
OEM service Manuel needed. It sounds like something is missing
like a gasket or wrong kit
or wrong float setting verify all jets are the right size and in the right place.