Topic: !955 Evinrude 7.5 7518 Gaskets – Antique Outboard Motor Club,Inc

This topic has 11 replies, 7 voices, and was last updated 10 months, 3 weeks ago by crosbyman.

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December 3, 2024 at 8:40 pm #292384
Rkymtn57
Would anyone have the part #s for the Head Gasket & Exhaust Cover Gasket. Thank’s

Also WTB , Please.
December 3, 2024 at 9:16 pm #292385
outbdnut2
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US Member
My 2004 Sierra catalog lists Sierra #18-2952 as the head gasket for 1957-58 7-1/2 HP. It might be the same for 1955 , as these motors didn’t change much back then (maybe someone here knows?). Says it replaces 203034. See if it looks like this one: https://www.marineengine.com/newparts/part_search.php?part_num=203034

If you call marineengine, they will probably know for sure.

Dave

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Rkymtn57
December 3, 2024 at 9:20 pm #292386
frankr
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203034 Head Gasket
202580 Exhaust cover gasket

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Rkymtn57
December 4, 2024 at 12:12 am #292390
crosbyman
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Canada Member
this may help

Joining AOMCI has priviledges 🙂

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Rkymtn57
December 4, 2024 at 10:14 am #292398
Rkymtn57
Thank you all very much !
December 4, 2024 at 10:24 am #292399
aquasonic
Participant
Regarding the exhaust cover gasket, from the factory there was only one gasket on the outside of the exhaust baffle. On the inside of the baffle some kind of sealant was used. Some of us prefer to use two exhaust cover gaskets. One on the outside of the baffle and one on the inside of the baffle. It may cost a little more, but it makes for a very dependable repair/service.

Improvise-Adapt-Overcome
December 4, 2024 at 11:07 am #292401
crosbyman
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Canada Member
check the exhaust cover plate for pin holes … I recall getting a stainless one from one member on here (sorry) .

Joining AOMCI has priviledges 🙂
December 4, 2024 at 6:58 pm #292416
aquasonic
Participant
crosbyman wrote:

check the exhaust cover plate for pin holes … I recall getting a stainless one from one member on here (sorry) .

Thats a good point about checking the exhaust baffle for pinholes. While you have it apart, clean it up well and give it a check with a bright light behind it to see if any light comes through. If so, you will need a new exhaust baffle.

Was it Wedgie that used to make SS replacement baffles? The factory ones were made from aluminum, and that’s why some of them failed. Especially ones used in saltwater.

Improvise-Adapt-Overcome
December 4, 2024 at 8:55 pm #292422
wedgie
Participant
It was not me, though I did buy some. It was 47zephyr(I think was his name) that made the plates. I haven’t seen him on here for ages.
December 4, 2024 at 10:25 pm #292428
crosbyman
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Canada Member
The plates were cut with some kind of plasma cutter or CNC metal cutter … super work perfect fit .

Joining AOMCI has priviledges 🙂
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