Yanmar 2GM20F mixing elbow

[TeamSpirit]

Has finally developed pin hole leak, does anyone know south coast supplier and have any hints or tips for separating old mixer from SS nut?
Its the high rise verion with a u bend rather than stright tube.

 

[TradewindSailor]

These Yanmar units are a constant source of hassle. I have two Yanmar 3ym30's .... originally fitted with the standard high rise. I had a local stainless steel fabricator make up complete units from the exhaust manifold joint through to the rubber hose from chemically resistant stainless steel. Sorry I don't know the grade. The units were cheaper even that buying just the Yanmar elbows ..... and I doubt if they will ever clog like the originals used to.

I suggest you search this forum for 'yanmar exhaust elbows' ..... it has been discussed a few times!

 

[TeamSpirit]

Thanks TWS, mine with careful maintenance has lasted nine years - thought about construction of replacement high rise out of SS which will avoid the hassle of separation of the parts too ! . Anyone signpost me to any suppliers/ engineers ?

 

[Blueboatman]

Cellar marine in cornwall? I have a bronze-ish casting hi-rise elbow which must have come from them originally, if that helps

 

[TeamSpirit]

Thanks Blueboatman I'll give them a call

 

[ga1135]

I bought one s/s unit for my 2GM20 from this supplier, half the price of original Yanmar parts and they delivered the parts to me within 1 week.

http://www.exhaustelbow.com/

 

[JimC]

The OP has a 2GM20F which is indirect cooled and uses a 4 stud elbow. http://www.exhaustelbow.com/ only seems to offer 3 stud elbows for the direct-cooled engines

 

[TeamSpirit]

The good news is I am now in possession of an spanking new exhaust mixing elbow and double threaded SS joint, the old one fell off and was seriously corroded and rusty and holed.
The bad news is the old SS joint is beyond recovery and it was not fitted with any anti seize so is not moving from the exhaust manifold - my solution and now awaiting delivery from at the local car parts factors is a deep impact driver socket and I am going to try some heat and a scaffolding pole / wrench currently soaking in penetrating oil has anyone l Anyone done this before? if so any tips before I loose my knuckles !

 

[JumbleDuck]

I bought one s/s unit for my 2GM20 from this supplier, half the price of original Yanmar parts and they delivered the parts to me within 1 week.

http://www.exhaustelbow.com/

I've got one of them on my 1GM10. Good service.

 

[UK-WOOZY]

just a heads up. i got a exhaust elbow a couple of years ago from ExhaustElbow.com but its now gone and sold to a different american company

bottomline marine want a whopping £400-500 for the OEM exhaust elbows

 

[fredrussell]

Plenty of choice of Yanmar elbows at parts4engines.com and, I assume, all the other boaty part companies like ASAP, etc.

 

[UK-WOOZY]

Plenty of choice of Yanmar elbows at parts4engines.com and, I assume, all the other boaty part companies like ASAP, etc.

might be worth researching your reply before replying with useless information

 

[AllanG]

Wow…..did you get out the wrong side of the bed, Woozy!!

 

[UK-WOOZY]

its annoying when people give advice but that advice is useless as those two websites do not do the elbows

 

[fredrussell]

…It’s the high rise verion with a u bend rather than stright tube.

Is this not what OP refers to?

https://parts4engines.com/products/...xhaust-outlet-kit?_pos=6&_sid=73e0c211e&_ss=r

Really no need to be rude Woozy, if I posted erroneously it was a genuine mistake. I thought that’s what we were talking about.

 

[vyv_cox]

Is this not what OP refers to?

https://parts4engines.com/products/...xhaust-outlet-kit?_pos=6&_sid=73e0c211e&_ss=r

Really no need to be rude Woozy, if I posted erroneously it was a genuine mistake. I thought that’s what we were talking about.

The OP posted 11 years ago!

But parts4engines and ASAP stock exhaust elbows as you said, just perhaps not for all engines.

 

[Sailing steve]

I've got one of them on my 1GM10. Good service.

I hope the warranty replacement from Ben at Exhaust Elbow lasts longer that the original one he sold me for my 1GM10.

I discovered that had failed after just two seasons use and the leaking hot salty water corroded the cylinder head exhaust port which meant a whole new cylinder head was needed at over a grand.

 

[ridgy]

Also from MSK Yanmar 2GM, 2GM 20 Exhaust Elbow Kit

 

[fredrussell]

The OP posted 11 years ago!

But parts4engines and ASAP stock exhaust elbows as you said, just perhaps not for all engines.

(Sigh) I know. I was just adding to what Woozy said when he made a bit of a tw@t of himself after bringing the thread back from the grave.

 

[vyv_cox]

I hope the warranty replacement from Ben at Exhaust Elbow lasts longer that the original one he sold me for my 1GM10.

I discovered that had failed after just two seasons use and the leaking hot salty water corroded the cylinder head exhaust port which meant a whole new cylinder head was needed at over a grand.

An assumption on my part: that the construction of elbows for the 1GM is the same as the for the 3GM. If so, the primary failure mode is fatigue, generating a crack between the tubes and flange. The fatigue is generated thermally, so if two years of use means around 1000 - 10,000 starts that would be sufficient for high stress, low cycle fatigue. Failure of mine is described well down this page. Fatigue