poor performance merc 140 ib

[Spoonriger]

my 1991 mercruiser 140 runs bad under load in netural runs great and rev's up good ,in gear at idle runs fine when you go to take off it bogs down shakes and runs terriable,i know the exaust bellow is bad ,thanks

 

[jerryjerry05]

Re: poor performance merc 140 ib

Could be a shift interupter switch hanging up. Bad shift cable.Both are part of the shift mechanisim.
Possible bad coil.J

 

[ziggy]

Re: poor performance merc 140 ib

have ya givin her a tune up lately and set everything up to spec best ya can?

have ya got anything to work with. might do a compression test to see where you stand.

 

[Bondo]

Re: poor performance merc 140 ib

Ayuh,... Change the fuel Filters...
If that Don't work,... Rebuild the carb....