Re: johnson 1991 v4 90hp wont start
The topic header says it won't start, yet you indicate it will run. Not sure just what you mean regarding the primer solenoid. You don't "turn it back to normal" during regular operations. To prime the engine for cold start, you push in on the key when it is in the on, or start position. That will inject a small amount of extra fuel direct into the carb throats. That's the choke operation. There is a red lever on the side of the solenoid, which is not to be moved during normal operations. That red lever should always be kept parallel to the length of that solenoid. You are performing a good test of the fuel system by constantly priming the hose bulb. That action forces extra fuel into the carb bowls. If the engne runs "normally" as long as you prime that hose bulb, you've got a fuel delivery issue. Very well could be a weak fuel pump. (Or fuel restriction-like a bad hose, sticking anti-siphon valve, etc.) The issue with a weak pump is that it may provide some fuel to run the engine, but maybe not enough to sustain it-this usually is a high speed WOT problem, but surely could occur at idle if the pump is weak enough.