I have a 1995 70h.p. force on a 20 foot sundancer pontoon,
it has a low rpm miss (around 17-1900 rpm)
And now at wot it will only reach about 3700 rpm and 14 m.ph. instead of it usual 4800rpm and 18 mph, it will surge up the rpm for a second or 2 and then back to 3700 rpm.
Things i have done.
Compression test, all cylinder within 5-10 p.s.i. of each other
removed and soaked carb and re installed
new fuel lines and filter from tank to carb, new primer ball
Rebuilt fuel pump
New plugs
Reset all carb and shifter linkages ( that was a pain)
Checked tank vent (its venting as it should)
It started this last year on our last outing, so when i opened it up for this years season i did all of the previous things i mentioned, took it out last night for the first time
it was running great for about 20 min. Then started back the way it was last year, lacking rpms and low rpm miss, at about 2100 the miss dissapears. But will not Rev above 3700 under a load. .
Fuel filter stays above 3/4 full at all times,
No fuel from the carb throat,
Pushing the choke while under way at wot, bogs it down even further.
Any help or advice would be appreciated before I give up and take it to the local shop.
it has a low rpm miss (around 17-1900 rpm)
And now at wot it will only reach about 3700 rpm and 14 m.ph. instead of it usual 4800rpm and 18 mph, it will surge up the rpm for a second or 2 and then back to 3700 rpm.
Things i have done.
Compression test, all cylinder within 5-10 p.s.i. of each other
removed and soaked carb and re installed
new fuel lines and filter from tank to carb, new primer ball
Rebuilt fuel pump
New plugs
Reset all carb and shifter linkages ( that was a pain)
Checked tank vent (its venting as it should)
It started this last year on our last outing, so when i opened it up for this years season i did all of the previous things i mentioned, took it out last night for the first time
it was running great for about 20 min. Then started back the way it was last year, lacking rpms and low rpm miss, at about 2100 the miss dissapears. But will not Rev above 3700 under a load. .
Fuel filter stays above 3/4 full at all times,
No fuel from the carb throat,
Pushing the choke while under way at wot, bogs it down even further.
Any help or advice would be appreciated before I give up and take it to the local shop.
