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35fordtn 02-04-2020 03:48 PM
Mercury head gasket question
 

I have not run into this before... On a 1941?? Mercury engine.
It is a 3-3/16" bore, with the early type Water passage openings (triangle on top circle in middle and trapazoid shaped bottom one) Nobody makes this gasket. Can a 59A 46-48 gasket be used even though the water passage shapes are different?

JWL 02-04-2020 04:11 PM
Re: Mercury head gasket question
 

Yes.

JSeery 02-04-2020 04:21 PM
Re: Mercury head gasket question
 

Quote:
Originally Posted by 35fordtn (Post 1848582)
I have not run into this before... On a 1941?? Mercury engine.
It is a 3-3/16" bore, with the early type Water passage openings (triangle on top circle in middle and trapazoid shaped bottom one) Nobody makes this gasket. Can a 59A 46-48 gasket be used even though the water passage shapes are different?
Not sure what the water passage shape/size has to do with the gasket openings? Most of the passages are way oversize to help in the removal of the casting core, the gasket controls the water flow.

Russ/40 02-04-2020 04:24 PM
Re: Mercury head gasket question
 

I believe an 81A copper will work too.

35fordtn 02-04-2020 04:36 PM
Re: Mercury head gasket question
 

Quote:
Originally Posted by JSeery (Post 1848600)
Not sure what the water passage shape/size has to do with the gasket openings? Most of the passages are way oversize to help in the removal of the casting core, the gasket controls the water flow.
I assumed there would be no issue, but wanted to be sure I was not missing something.

JSeery 02-04-2020 04:39 PM
Re: Mercury head gasket question
 

Looks like the pro's have spoken (that's not me!) LOL.

34fivewindow 02-05-2020 03:15 AM
Re: Mercury head gasket question
 

Quote:
Originally Posted by 35fordtn (Post 1848582)
I have not run into this before... On a 1941?? Mercury engine.
It is a 3-3/16" bore, with the early type Water passage openings (triangle on top circle in middle and trapazoid shaped bottom one) Nobody makes this gasket. Can a 59A 46-48 gasket be used even though the water passage shapes are different?
Try this gasket its what i use on a 40 Mercury block, Fel-Pro # 7548 - B


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