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  Topic Review (Newest First)
05-12-2013 09:52 AM
Re: Yanmar 3GM30 engine: information needed on rebuilding

Having gone this route let me add my 2 cents.

First, the correct engine service manual is free on my website. For all who need a manual for the Yanmar GM series, download it directly from this page.

Yanmar Marine GM service Manual

Sorry I didn't see this thread sooner, or I could have saved you some trouble.

As for parts...I live in central Florida, and can't speak for Louisiana Yanmar dealers. However I've found a Yanmar dealer here who is always 20% lower on new parts than what you see online.

Marine Pro

Lastly, this same Yanmar dealer has a building ... not a room ... an entire building ... full of old engines they've pulled over the years. It's amazing in this day and age to see a business not part out their used inventory on ebay, but not all are computer literate.

I found all the parts needed to rebuild a 1GM10 by wandering in and out of isles full of old Yanmar engines. That's the good news, now here's the bad news... these wonderful folks have no idea what's in this building. You have to show up in person and ask, and if they like you , in you go. Their prices are what you are looking for.

Different State but not that far. Maybe this will help...maybe not...

Good luck
05-10-2013 04:23 PM
Re: Yanmar 3GM30 engine: information needed on rebuilding


I have spent hours online and on the phone trying to beat the bloated prices that Yanmar demands for replacement parts. The Company has a lockdown on their distributors, including fixed prices and limited sales territories. If you're in Louisiana, as I am, you can't shop. You buy from the bayou guy. You buy bayou. Period. Carlos Slim, the Mexican megalo-monopolist, could take lessons from these tyrants. You can't even get a Parts Manual without paying the Company $80 and waiting for the mail to arrive. Oil pumps jumped 50% in price in the last two weeks. Torresen Marine adds 10% to the already outrageous Yanmar prices.

As suggested by HUGOSALT, I attempted an end run, surreptitiously calling Yanmar tractor parts suppliers using Yanmar marine parts numbers (meticulously gathered by squinting at websites and diagrams for hours). I reasoned that Giants in the Earth might get better prices than Yachties in the Club. From Hoye Tractor Parts, great guys by the way, I managed to get some cross-references and tractor model numbers. But Big Daddy YanBucks has his thumb on the tractor guys too. Their tractor parts are even more expensive than their marine parts. I imagine that farmers with unplowed fields are more desperate for parts than yachties with warm Daiquiris. So, Yanmar sticks it to the hayseeds with vigor.

I then tried a "Chinese-Fire-Drill" end run, looking at Chinese suppliers of "after-market" parts (translation: counterfeit parts). The ebay ads are enticing: Yanmar ring sets are $16 instead of $50 each. I lusted after high-pressure fuel injector tubing and oil tubing. My engine is covered with rusty spiderwebs of this stuff. Basically, the parts are steel tubes with flare fittings and nuts on the ends --- your basic steel soda straws with threads. Should be about $8 each. Yanmar wants $45 each.. I need an armload.

Uber-Alas, the Chinese can sell you most any part you need for current-production tractor and excavator parts. But the Yanmar engine model 3GM30 has been out of production for about 9 years, except in Europe where the Japanese are shipping boatloads of new engines to the Continentals and the Brits like a latter-day Marshall Plan. For me, a damn Yankee, it's No Tickee, No Washee. I am resigned to buying from Tyrant-osaurus Wrecks, Inc. and paying their exorbitant prices.

I do, however, have a line on some salvaged Yanmar engines. I may rob Piston to pay Poppet, making one good engine out of two, even rebuilding a third engine to sell. The profits could pay for all this mechanical mayhem.

There is a silver cylinder lining to this tale. The Chinese suppliers have websites with hyper-interactive chat features. Their salespeople are often lovely young, educated women who seem quite attracted to mature American men. I won't go into detail except to say that the off-site Skype conversations have been enchanting.

SO, HERE IS THE BOTTOM LINE ON YANMAR PARTS, GUYS: Forget the tractor dealers. Forget price competition among retailers. If you have a current-production Yanmar Engine, try the Chinese entrepreners at Manufacturers, Suppliers, Exporters & Importers from the world's largest online B2B by entering the engine model and parts numbers. You might be able to cross-reference industrial parts and marine parts. Even if you can't find what you want, you will get an eyeful. You will find hard-driving manufacturers like America of the 1950's, but on digital steroids. You will learn why Walmart products are over 80% Chinese-made. You might even meet a lovely cherry blossom to brighten your day and fill your email inbox with unbeatable offers.
04-21-2013 01:04 PM
Re: Yanmar 3GM30 engine: information needed on rebuilding

Originally Posted by JimsCAL View Post
And it seems that Yanmar dealers have regions that the parent company allows them to sell to that limits price competition.
Yep. Found a gasket on the east coast but he couldn't see to me since I wasn't in his "area". He would allow me to purchase and have it shipped to an address in his area, then forwarded to me. (That seemed a bit silly)

Ended up having the dealers work among themselves to find the gasket and get it to me.
04-20-2013 05:24 PM
Re: Yanmar 3GM30 engine: information needed on rebuilding

Since Yanmar builds their own engines, not getting an industrial engine from someone else and marinzing it, you don't see the big difference is parts price like you do with engines like Universal. And it seems that Yanmar dealers have regions that the parent company allows them to sell to that limits price competition. Still better than Volvo however.
04-20-2013 08:41 AM
Re: Yanmar 3GM30 engine: information needed on rebuilding

I did a "top" overhaul on my 3GM30 a couple years ago. Replaced the head, valve train, heat exchanger tank, injectors, injector lines, mixing elbow. I did the work myself with no prior experience.

I'm in Alaska, ordered my parts thru Gallery Marine in Seattle (good guys to work with). I purchased a Seloc Yanmar service manual and a Yanmar parts book.

Parts were expensive, I bought new and didn't shop around (I was doing this right in the middle of our prime sailing season). The only thing we had trouble finding was a head gasket.
04-20-2013 07:57 AM
Dog Ship
Re: Yanmar 3GM30 engine: information needed on rebuilding

Our boat has a rebuilt 3gm30f.
The previous owner had the old A4 removed and replaced with one.
In all he had a rebuilt 3gm30f with it's associated parts, ie; fuel tank, wiring etc., a new transmission, driveshaft and stuffing box all replaced. Total cost was $12,000.
The parts are easy to find but don't use regular Yanmar tractor parts, use there marine grade parts only. There is a difference.
04-19-2013 10:30 PM
Re: Yanmar 3GM30 engine: information needed on rebuilding

Try for the manual. for parts. Not cheap!
04-19-2013 10:29 PM
Re: Yanmar 3GM30 engine: information needed on rebuilding

Believe that service manual is available for download on line.
Thinking many of these parts are interchangeable with Yanmar
tractor diesels if you can id to equivalent motor.
Take a look at "Hoye tractor parts" web site.
04-19-2013 05:17 PM
Yanmar 3GM30 engine: information needed on rebuilding

I am looking for information on rebuilding a Yanmar 3GM30F engine. Does anyone have experience with getting overhaul parts at good prices? Anyone have access to a service manual? I also will need an exhaust elbow. Thanks!

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