Permatex for Power-head base gasket? (304314)

[LARRY CATON]

I searched the threads about the power-head base gaskets, but didn’t see anything about foregoing the gasket and using some type of “Form-A-Gasket” such as the original Permatex #2 (non-hardening), or the newer Permatex Optimum series designed for easy disassembly.

I just replaced the water pump impeller in a 5.5 Hp, Johnson CD-15.  Prior to removing the power-head, I noted that the gasket is about 1/16″ thick.  I’m wondering if the gasket provides a critical clearance.  The drive shaft seal is essentially “spring loaded” with the spring beneath the carbon seal, O-ring, etc., so I’m wondering why I haven’t seen anyone mention using Form-A-Gasket.

I understand that you wouldn’t want to over-apply a gasket-maker that could squeeze out, break away, and cause a cooling system clog.

1956 Johnson 15 Hp, FD-10
1957 Johnson 5.5 Hp, CD-14
1958 Johnson 5.5 Hp, CD-15

[Bob Wight]

I’ve not heard of using any type of form-a-gasket sealer in place of the gasket itself.  If you were concerned about easy disassembly in the future, some folks just apply grease to the base gasket – it will act as a gasket sealer while allowing disassembly in the future.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp

“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."

[JACQUES]

the PH  base gaskets only seals  exhaust and water no big PSI like  cyl head etc..

 

I have never applied sealant

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