From idle to WOT

[Eazzy]

Need a brain refresher when taking off from slow idle 1000 to WOT carb loads up a little but then takes off ok do i turn the jet screw in or out it is set at 1 turn out now. 1996 75 Force with single carb. Read setting before on here can't seem to find it now Thanks

 

["B"]

Re: From idle to WOT

I think the setting is 1 and 1/8 but that would make your mixture more fuel rich. Perhaps your issue is timing and not fuel related. Or, it could be your exhaust ports are carbon clogged. Maybe try a de-carb process see if that helps. Good luck.....

 

[spool]

Re: From idle to WOT

I think the setting is 1 and 1/8 but that would make your mixture more fuel rich. Perhaps your issue is timing and not fuel related. Or, it could be your exhaust ports are carbon clogged. Maybe try a de-carb process see if that helps. Good luck.....

Read this
http://forums.iboats.com/showthread.php?t=431021

"8B. Now go the opposite direction. Adjust until the engine runs rough, burbles, or stalls. Note this setting.
8C. Set all needles to the average between the two settings: That is, for example, if it stalled at 3/4 turn out and burbled at 1 1/4 out then set all needles to 1 turn out.
8D. Readjust idle speed to 700-750 RPM.
9. Take the boat out on the water and do a "hole shot"--Full throttle acceleration from a stop. If the engine "sags" then recovers and picks-up it is too lean. Open the needles about 1/16 turn at a time until the engine accelerates with no hesitation.
If the engine sputters or coughs or burbles, then clears itself and accelerates, it is too rich. Close the needles about 1/16 turn at a time until the engine accelerates smoothly."

 

[roscoe]

Re: From idle to WOT

A slight stumble before acceleration is good. And also expected it you have been idling for a while.

Instant acceleration is usually a little too lean.

 

[Jiggz]

Re: From idle to WOT

Need a brain refresher when taking off from slow idle 1000 to WOT carb loads up a little but then takes off ok do i turn the jet screw in or out it is set at 1 turn out now. 1996 75 Force with single carb. Read setting before on here can't seem to find it now Thanks

Usually, with hesitation for shot out of the hole means adjusting air screw out or CCW. Experiment turning the air screw out 1/8 of a turn each time and see where you are satisfied. You don't want to go above 1 1/4 turn out for this will result in too rich of a mixture fouling the plugs. On the other extreme you also don't want to go below 7/8 of a turn in due too lean of a mixture causing piston and cylinder damage.

 

[Eazzy]

Re: From idle to WOT

Thanks guy's had a brain fart glad youall are here to keep me straight.