Need help YANMAR engine mount

[quiksilver]

Hi,

I had the exact same problem with broken engine mounts on Lagoon 410 S2 catamaran with approx. 500 engine hours, factory installation. It has two Yanmar 3jh4e engines with sd50 saildrives and two mounts on both engines + one mount on saildrive, so the engines are supported on 3 points only. So the two mounts of both engines broke at exact same place on the studs, leading to a broken and severely leaking saildrive double seal on SB engine due to twisting. The Yanmar service at Gran Canaria is a joke so in the end I had to have the studs welded back together and stuff a part of water hose to the saildrive seal to make the leak smaller and sail back to Estonia like that.

I also remember reading about someone else having the same mounts breaking.

Karmo

[Giulietta]

My engine mount (only one broke) broke in November 2006, after 150 hours in service. And we had sailed in pretty high seas and winds with the engine on for 20 minutes, which I believe its when it broke..luckily never had problems with the saildrive leak...

Anyway, the new mount was installed right then, and since then my engine only worked 50 more hours, most of them sailng the boat to where it is now in July.

So far so good, and I do check them periodically...

Thanks for sharing and explaining your case..I will transmit it to my Yanmar friends.

Why didn't you stop in Portugal to repair?? Yanmar here is very good.

[camaraderie]

I don't think the sail drive was meant for going 15 knots...the force of the water torqued the whole engine and broke your mount! (g)

[Rockter]

I would buy a spare mount, or two, and watch the others.

Interesting that they took the old one away with them.

[Giulietta]

They took it to send it to the manufacturer in Japan, to complete the complaint/guarantee thing.

I didn't want it any way.

Everything seems normal now, and I'm happy

[jackytdunaway]

Broken boom, broken engine mount stud, who knows what else. Trade it in for a Catalina. CD can help you find one.

[Giulietta]

ahhhh that was funny...but what would I do with a Catalina???

Be just one more guy with a Catalina???

I like being different...and believe me, many more things will break starting in November..that's a guarantee

By the way...can a Catalina do it???

[theartfuldodger]

such a break is a defective bolt, for the real break if not installed right would have been at the mount, this happens alot in the automotive industry, and after test performed by labs, the bolt was not harden right. If you wish to know my experience 35 years in the automotive industry, heavy equioment and marine as well. I myself installed new engine in my 33 O/I Morgan two years ago, and works very good, thanks to Yanmars retrofit kit.

S/V The Artful Dodger

[Giulietta]

Originally Posted by theartfuldodger

such a break is a defective bolt, for the real break if not installed right would have been at the mount, this happens alot in the automotive industry, and after test performed by labs, the bolt was not harden right. If you wish to know my experience 35 years in the automotive industry, heavy equioment and marine as well. I myself installed new engine in my 33 O/I Morgan two years ago, and works very good, thanks to Yanmars retrofit kit.

S/V The Artful Dodger

Thanks for your input..that was my initial idea, but they said otherwise..

anyway...all is fine now...