well a friend of mine has a 1990s yamaha 75hp pro 2 stroke 3 cyl,
outboard starts ok at first idles ok .
run to fishing ground 20 mins at any troottle no problems,
soon as he goes back to idle engine wont idle and stalls most of the time,
fish for a while go to start engine and it turns over but wont fire untill he puts the revs up quit abit,
put in gear and stalls again, idle seems rough then smoothings out and away we go,
its the same everytime,
just wont idle,
heres what weve done so far,
took carbs apart , clean and rebuilt ,
synced carbs
checked fuel pump,
checked for air leaks
checked thermostat,
changed plugs,
ran engine with spark testers and seems to have good spark ,
clean all grounds,
compression checked out good and even , cant remember the numbers but were very good,
anything else worth checking out.
thought it was defo just a carb problem but after doing the fuel systm dont think it is now,
outboard starts ok at first idles ok .
run to fishing ground 20 mins at any troottle no problems,
soon as he goes back to idle engine wont idle and stalls most of the time,
fish for a while go to start engine and it turns over but wont fire untill he puts the revs up quit abit,
put in gear and stalls again, idle seems rough then smoothings out and away we go,
its the same everytime,
just wont idle,
heres what weve done so far,
took carbs apart , clean and rebuilt ,
synced carbs
checked fuel pump,
checked for air leaks
checked thermostat,
changed plugs,
ran engine with spark testers and seems to have good spark ,
clean all grounds,
compression checked out good and even , cant remember the numbers but were very good,
anything else worth checking out.
thought it was defo just a carb problem but after doing the fuel systm dont think it is now,