Merc 225EFI 0G789393 In the process of swivel pin replacement, I'm finishing the ridiculous job or removing the original powerhead gasket. Using 3 different gasket remover solvents, and ONLY plastic chisels and razor blades, I've pretty much come to the end of the road. What I thought would end up looking like a smooth polished surface, looks like pics. Is there a step I am missing as far as finishing the surface? thumbnail_Image.jpgthumbnail_Image 2.jpg
Last edited by jerzia; 05-24-2020 at 08:26 PM.
did you try oven cleaner?
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No I haven't. I used Permatex as well as CRC gasket remover as well as something Don Weed recommended, Power Tune.
Last edited by jerzia; 05-25-2020 at 04:27 PM.
they bad aint they , why we get the big moneyyea right
.................................................. ...the scariest thing in life is the unknown ...................................
NEVER use a rotary tool on the powerhead surface. Even well seasoned techs have been known to damage these surfaces as just the slightest wrong twitch of the wrist can result in more than the allowable .005" surface distortion.
To finish off the cleaning, get one of those finer-grit 3M scuff pads (I like the burgandy style) and use it WET to help remove any remaining material (BY HAND, AGAIN NOT WITH ANY ROTARY TOOL).
The adapter plate surfaces are he only ones that should be primed and painted to a "perfect" paint finish. Powerhead surface remains bare (and perfectly clean).
Follow service literature torque information for YOUR engine model as the nuts do NOT all torque the same.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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That is what I needed to know!!!! Adapter plate all done and painted. I was aware about the torque difference, but thanks for the heads up. Put in my part order last week, so once it gets here I want to be ready to go. Thanks for the help, much appreciated.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
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