Post By: slimmy Posted: 5/15/2019 3:21:33 PMPoints: 3
I recently got news that my 2002 mercury 150 EFI has bad compression on 3 of the cylinders so basically its a bad motor? I'm not sure what to do because the mechanic said its not worth to rebuild. Any suggestions on how to trade-in the old motor or sell it. The boat is in great condition so I'm kind of stuck on what to do.
Get a second opion. I use Pat at Vintage Outboard in Arvada,he is fair and knows his way around boat motors. You must make an appointment and he only answers the phone from 8am till 8.30 am. 5745 Tabor st. Arvada 80002-1403 303-456-9926 I would not throw in the towel just yet . . . .Pat may have a source for a new power head or know a good way to fix your old motor. BTW . ./ .please let us know how this turn's out. Thanks, HP
Its a 2 stroke and the hours are not crazy I'm guessing. It spent most of its life on Standley lake so the runs worn't far. I took it to island lake marine and I trust the technician, he said he I shouldn't rebuild because the issue could occur again. I'll try calling some other places to get a second opinion.
sometimes low compression is due to rings stuck in the groves on the piston.....due to carbon and gunk. If you don't run it up much, it could just need a major Seafoam treatment to clear out the crap in the combustion chamber. Migtht be something to try before paying a mechanic. Look at the how to videos on their web sight..
Reply by: kicker Posted: May. 22, 6:21:34 AM Points: 112
This is a good motor IMO. So what caused this to happen? I always use Mercury products only. Use a fuel system cleaner every season. Use Top Tier fuel only and a minimum of 87 octane. Fuel stabilizer every winter.
I agree run some Sea Foam or Berrryman B12 through it.