1gm10 oil leak

[danbridger]

This evening I noticed that my Yanmar 1gm10 has an oil leak. The engine is running fine,but there is a steady drip of oil.The oil is dripping from near the rear of the engine on the port side.The view and access is not great but it appears to be from around the oil pipe that attaches behind the starter motor.before I go out and buy the parts, are there any other possibilities other that that oil pipe?. It definitely isn't coming from the oil pipe below the water pump.

 

[sailorman]

others will give the full SP, but the oil pipe below the crankcase is susceptible to corrosion.

http://www.ybw.com/forums/showthread.php?306007-Yanmar-Oil-pipes&highlight=GM+10+oil+pipe

 

[Evadne]

Is it the pipe itself or the join? The banjo joints rely on copper washers to seal, so if they are disturbed, and not replaced (or re-annealed) they can leak. Also if they come loose obviously. The oil pipes are all steel so it's not just the one under the water pipe that can rust through and leak, the one under the drip from the exhaust anti-siphon valve was one for me...

Not sure what else is there, without looking at the manual.

 

[danbridger]

Thanks for the replies so far. I am not too worried as to whether it is the pipe or the joints as they will both have to come off. I was more worried that there was another, more serious, cause before I order the bits and get ready for an hour of cursing and grazed knuckles.
These engine queries always seem to be for 1gm10's. Do they break down more often or is it that they are owned by the sort of cheapskates that try to fix it themselves, rather than just getting a man in!

 

[rob2]

No, it's just that the 1GM must be fitted to ten boats for every other engine type. It was used extensively to replace small petrol engines as it is compact and lightweight, whereas most other manufacturers either only made multi-cylinders or still used a single that looked (and weighed) the same as a Victorian industrial pump! Plus, of course they are now at least several decades old.

Rob.

 

[Tranona]

Not really. The engine has been in production virtually unchanged for over 30 years so there are a lot of them about, many elderly. The cheapskate bit might have something to do with it as they are often in boats being run on a tight budget. The common faults are well known and easy to fix or avoid.

 

[prv]

Plus, of course they are now at least several decades old.

A lot of them are, but I believe Yanmar are still selling them. The only member of the GM range still manufactured, as it still fills its niche very well.

Pete

 

[Niander]

That thin oil pipe supplies oil to the top of your engine so you had better have a good look at the problem maybe a tiny hole in it or the banjo fitting may need tightening...you have to take the starter motor off...very simple if your a competent DIY type