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Please Identify this trim pump for a 1995 Mariner 90

4

43_lx_merc_1996

Regular Contributor
Hello all. I’ve been struggling for months trying to find a replacement power trim pump for my 1995 90hp 2-Stroke Mariner project. All part numbers that I have located via Merc and aftermarket refer me to various trim pumps with the square gasket, whereas mine is a round gasket/O-Ring. See below pictures. Any help greatly appreciated!

Thank you!

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Are you looking for a new pump assembly or O-rings to rebuild? in which the O-rings would come in a kit.

Here's your trim pump and there are aftermarket options if desired, https://www.marineengine.com/parts/mercury_marine_parts/sn/0G073696/7090412CD/554_350

Here's all your engine parts, https://www.marineengine.com/parts/mercury_marine_parts/sn/0g073696

If you want a new Mercury pump, it looks like this place may have 1 left in stock as they are considered no longer available, https://www.crowleymarine.com/marin...ack-fill-plug-s-n-usa-0g360002-bel-9934136-be

Usually if you're looking for good used ones then grab the desired part number and search it out on Ebay as sometimes you'll find it there.
 
Thank you, but Unfortunately all of those links refer to the following part numbers, all of which have the square seal. 8M0171817, 0G360002, & 824052. I have purchased two of the above parts and will need to return them. The round seal unit only seems to exist on the parts diagram. What am I missing here?
 
43_lx_merc_1996 said:
Thank you, but Unfortunately all of those links refer to the following part numbers, all of which have the square seal. 8M0171817, 0G360002, & 824052. I have purchased two of the above parts and will need to return them. The round seal unit only seems to exist on the parts diagram. What am I missing here?
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Looks like you have opened up the housing to where there are 2 designs of O-rings, the higher (top) side of one looks square and the lower one looks round.

Here's a few photos of 8M0171817 opened up, maybe that will be of some help in a visual, https://www.ebay.com/itm/295336768841?mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338678874&toolid=20006&customid=s%3AGS%3Bgc%3Aaeca24988c3e11ad303f40d7b5c4ea9d%3Bpt%3A1%3Bchoc%3A1&customid=s:GS;gc:aeca24988c3e11ad303f40d7b5c4ea9d;pt:1;choc:2&msclkid=aeca24988c3e11ad303f40d7b5c4ea9d

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That motor is not compatible. See photos at the top. I need the round O ring setup, not square. I get that I need to upgrade the relays and change to a two wire. I’m still stuck. Thanks!
 
This is the correct motor as it has been superseded twice...our you can buy the OEM listed motor. You cannot buy any parts for the square Prestolite motor.
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Again, it’s not possible to fit that motor and reservoir the my round base with a round o-ring. I cannot seem to find a part number to change the base to fit the newer square reservoir. Again see my picture below.

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