Crankcase sealer

[Steve Martin]

What’s the preferred sealer for crankcase halves?  I’m not happy with Permatex Permashield.

 

[reivertom]

I’ve always used 3M 847 sealer. It comes in tubes and is oil and gas resistant. It has been a long time since I bought any, because it goes a long way, but I assume they still make it…..

 

update……. After a little search, the answer is yes, they do. https://www.amazon.com/3M-Nitrile-Performance-Rubber-Adhesive/dp/B008F8WD04/ref=asc_df_B008F8WD04&mcid=1c221f54cbdb3195bfeb292e81e89532?tag=bngsmtphsnus-20&linkCode=df0&hvadid=79989588515103&hvnetw=s&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=&hvtargid=pla-4583589116771168&psc=1

 

 

 

[Bob Wight]

If the crankcase halves use a spaghetti seal, I’ll use the 3M847.   If it’s just a metal-to-metal surface, I’ll use Permatex Anaerobic sealer or Permatex Motoseal.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

[reivertom]

Bob Wight wrote:

If the crankcase halves use a spaghetti seal, I’ll use the 3M847.   If it’s just a metal-to-metal surface, I’ll use Permatex Anaerobic sealer or Permatex Motoseal.

Yeah,  When I saw this, the first thing I though of was a lower unit.

[Author]

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