[C320-list] Yanmar fuel lift pump replacement

[Ade Bateman]

Hi Ken,

The write-up linked from this page: https://c320.org/filemgmt/viewcat.php?cid=5
Direct link: https://c320.org/filemgmt/visit.php?lid=192

The Yanmar part number for the replacement pump is 129301-52020. You also need a new gasket (Yanmar 121520-01851).

You an get after-market parts for about $40 and Yanmar OEM parts for about $120. Given that the pump has been working fine for almost 30 years and I don’t intend to replace it again, I bought the OEM part.

I also replaced the bolts that attach the fuel lines (Yanmar 105582-59150). That’s definitely not normally necessary, but in my case, I discovered that the cause of an ongoing tiny fuel leak was where one of the bolts had been overtightened and damaged the threads so replacing both for $10 seemed worth it while I was doing this project. Either way, you should replace the 8mm copper washers (2 on each side).

Hope that helps,

Ade.

From: KEN GEIGER <kendgb at aol.com>
Sent: Sunday, January 29, 2023 11:59 AM
To: C320-List at Catalina320.com; Ade Bateman via C320-list <c320-list at lists.catalina320.com>; C320-List at Catalina320.com
Cc: Ade Bateman <ade.bateman at outlook.com>
Subject: Re: [C320-list] Yanmar fuel lift pump replacement

Hi, what replacement pump did you use and can you post a link to Troy's write up.

Ken Geiger
Northern Dream
765 2000
Sent from the all-new AOL app for Android<https://play.google.com/store/apps/details?id=com.aol.mobile.aolapp>

On Mon, 30 Jan 2023 at 3:44, Ade Bateman via C320-list
<c320-list at lists.catalina320.com<mailto:c320-list at lists.catalina320.com>> wrote:
I just wanted to send a quick note of thanks to Troy Dunn for writing up and posting the instructions for replacing the lift pump on the Yanmar 3GM30F. I replaced mine yesterday. It turned out to be a straightforward procedure, but I was glad to have reviewed Troy's write-up ahead of time. Removing the remains of the old gasket was time consuming but otherwise the replacement was quick and easy.

Thanks again,

Ade.

--
Sound Thinking, #257 (1995)