Hopefully, I can help another when the time comes...
Today I need some ideas...
Started out on a 7 day boat ride...
Fresh oil, fuel, plugs, wires, filters, 2 new heat exchangers...
First day...average 9 knots around 2300 RPM for...8/9 hours...uneventful day....stopped for fuel and slip.
Next AM....2 hours in...port engine....RPM's drop to 1000 then 2000 then 1000....fluctuating...tried increasing the throttle...throttle wouldn't move up/increase....ran around 1200 RPM and matched the port engine the same and limped along. Got to a marina....mechanic does his diagnosis...replaced the coil and control module....next morning...underway fine.
Port engine no issues. 7 hours in....SB engine...acting up...same symptoms as port. Stopped...mechanic comes out...replaces coil and module also.
Underway...few hours in...SB cutting out....lower the throttles and mosey along...1800 rpm's...
SB acts up still...after a few hours....
Doing research...cause so far... money spent been....questionable...
Engines do NOT overheat....180° area..
Oil pressure is fine..
Transmission issues ruled out.....
1020 hours on engines....
Concensus is.. we all agree to disagree.....
Half say...electrical issue...half say.. fuel injection issue...
Paying a tech...to guess...essentially just swap out parts...wasted money. Both techs hooked up....some code reader with flashing red light and went from that point..
Just before the engine acts up...tried increasing the throttle...gas lever...won't allow me to go up...down is fine....
Suggestions...
Pompano Beach area...
Thank you for reading and potential replies...