Re: 95 johnson oceanrunner
when it surges does the tach drop to the same rpm,for ex.if running at 4000 and it drops to 3400,then kicks back to 4000,that would likely indicate a cyl.drop,if thats the case check all connections at coils,including the small primary wires,check the grounds to coils also,you could have loose primary or larger sparkplug wires,they should have put new plugs after rebuild,but during breakin extra oil could have fgouled,that said,you may have an issue with fuel system,but you would have an alarm if the vro system is being used and everthing hooked like factory,did you squeeze the ball during the surge,doing so will send a large flow and the surge will stop,does the ball collapse,if so prob is upstream toward tank you need to be sure your vent is working ok,a simple loosening of fuel cap thus venting that way will correct,then change or clean vent,you could have hose kinked in fuel delivery,anti siphon at tank,if you have access,do a spark and compression ,however the symptom being occasional may not show much,did the eng blow up,did they figure out why ,you may have the same problem,being fuel starved,are filters cleanlet us know what you find
