25 H.P. Mercury

R.Harris

Recruit
Joined
Aug 24, 2001
Messages
3
I have a 1999 25 H.p. mercury that I was hoping to get the specs for the stator and trigger. Am having trouble planing out and suspect possibly one or the other. Have had carb cleaned and have good compression. Yet sluggish on takeoff and acts as though running half throttle with no miss. Have been told that 97-99 had problems with exhaust plate leaking water into cylinder is this just rumor or fact? Model# OG827413.Any help with the readings would be much appreciated. Thanks
 

25xs Mercury

Cadet
Joined
Mar 16, 2003
Messages
7
Re: 25 H.P. Mercury

Did the motor "ever" work properly on the boat where this problem is found???<br /><br />If you have changed nothing and the boat used to plane right off, then remove your lower unit and inspect the o-ring at the top of the driveshaft... The crankshaft has a hole straight from the driveshaft splines to the bottom cylinder area. Also replace the exhaust manifold gaskets and be sure they are new and torqued properly.<br /><br />Be sure neither sparkplug wire has rubbed through and might be grounding itself out to the block.<br /><br />Good luck with it, post back the results.
 
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