peter lowry
2009-02-26T16:50:44Z
Hi all

Having just completed a full service of the engine and replaced all the usual anodes ,impellers and filters etc. all relatively simple jobs but the one job that i neglected to check last season was the exhaust elbow .Yanmar did a complete check on the engine 3 years ago and replaced the elbow ,so to see it completely desintegrated away was a bit of a shock.What happens is you get water back up into the cylinder head and the head gasket blows and this will wreck your engine.

At the cost of £142.00 i feel money well spent, so if you do your own servicing check this bit too.

Peter Lowry

Cleo.

Geoff Harwood
2009-02-26T21:26:24Z
Trevor Baker (22/134 Wight Seal) had that problem on his 1GM10. The only symptom was that he was only getting about 1hp out of the engine! The elbow looked fine from the outside. Inside the sleeve that should direct the cooling water down away from the engine had developed a leak in the weld that let cooling water back into the exhaust port resulting in a blockage of black concrete (presumably salt and carbon) reducing the port to about 1/4 inch diameter!UserPostedImage[img]http://i144.photobucket.com/albums/r189/geoffatstanpit/Yanheadold.jpg[img][/img]http://i144.photobucket.com/albums/r189/geoffatstanpit/Yanexhaustnew-1.jpg[/img]UserPostedImage

If that worked OK you should have pics of the elbow and port as was and the same new.

Geoff Harwood
2009-02-26T21:34:14Z
Well - it nearly worked. We got the pic of the old elbow and the new head. This should give the pix of the new elbow and the old head!UserPostedImageUserPostedImage

Hope that works better

Geoff Harwood