Re: Need a Marine Mechanic - 150HP Johnson
Have you checked to see if you have spark on all cylinders with a spark tester- they are like $20 and worth having, inspected the plugs, made sure they are at the proper gap and clean,does the fuel bulb stay firm after you pump it,just had that issue and 24' of good line later that is good, a power pack on its way out can cause that issue as well(spark tester), sometimes when they go, they start off only intermittently not firing on a cylinder, possibly a coil base timer...
The vro is what went on our powerhead before we got the boat the powerhead was replaced and have done the mix in the tank since, it's just one less thing to go bad on a 97 engine, if you go that route:
On ours the-
Purple,gray,black,brown w yellow trace is the wire colors for the vro plug/alarm on the port side under the starter- bottom plug was it on motor, don't know your year though.
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