I have a 1973 85 HP Johnson motor pushing a 1981 16 ft ranger boat. We have had the boat & motor only a short time, so do not have good reference points on how this engine performs.
The engine appears to be consuming a great quantity of fuel...perhaps 1 gallon per mile...
Question..when we trim out the motor to get the boat to plane, we have the motor tipped down quite a bit (cylinders are lower than the carburetor)...would this cause fuel to pass right through the carburetor float into the cylinders...causing this large consumption of fuel?
The motor is a bit difficult to start, but runs fine once started. The spark plugs are "wet" and have some carbon on them.
I have checked the compression, and three cylinders are about 110, and #4 is 92...a bit low on this cylinder...
The engine appears to be consuming a great quantity of fuel...perhaps 1 gallon per mile...
Question..when we trim out the motor to get the boat to plane, we have the motor tipped down quite a bit (cylinders are lower than the carburetor)...would this cause fuel to pass right through the carburetor float into the cylinders...causing this large consumption of fuel?
The motor is a bit difficult to start, but runs fine once started. The spark plugs are "wet" and have some carbon on them.
I have checked the compression, and three cylinders are about 110, and #4 is 92...a bit low on this cylinder...