Home › Forum › Ask A Member › 1974 Evinrude 9.9 won’t idle at low RPMs, need help › Re: 1974 Evinrude 9.9 won’t idle at low RPMs, need help
A compression test will give you a good idea of what condition the motor is in. Look for at least 80 Psi,after 5 pulls of the starter cord. Pull that cord like you mean it, both plugs out.
The carb low speed needle should be set at 1 1/4 turns out counter clockwise, after turning it in clockwise all the way to lightly seated ,not forced closed all the way,that’s your starting point.
Do you have fresh gas at the proper 50:1 ratio? Did you start with a clean tank and hose,no water in the tank ?
Looks like it’s smoking a bit , should be able to run without the choke .
Feel the top of the motor,the flat spot right above the cylinder head. Is it warm? It should be quite warm ,if not your thermostat is stuck open or missing.
Our experts here will chime in with a lot more tips,and welcome to the forums.
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