Howdy folks! The Admiral and I have started to breath life back into our 1978 Lancer
30 and the first item on the docket was attempting to repair the old inboard, a Yanmar
SB12. We had an engine
failure during sea trial and ended up having to sail back to the dock
as the little diesel
had motored out into the river just fine but we were on our way back when it died after a only few minutes at WOT. Besides an obvious fuel
problem, we also had a blown head gasket
with raw water
actively flowing tween cylinder head
Now, the purchase price
changed considerably after this revelation and while the Admiral was not convinced, I assured the seller that we were still all in after a good haul-out and otherwise satisfactory survey
. So I had visions of re-powering her with either EP or even a newer diesel
but also realized that this would eat a significant portion of our rebuild budget
, pushing other important items well down the road... while successfully completing a repair was a big question as I wasn't really 100% certain of it's overall condition, despite my insistence otherwise. I did know the motor
had less than a thousand hours on her. I also knew the boat had been overall, relatively well maintained, despite sitting for however many years she may have sat (I suspect many) and while she WAS running, the little diesel ran well. I've little experience with diesel motors but have heard fantastic stories of these little motors and how you just cannot kill them, if they are cared for properly.
Post purchase inspection
of the yacht boosted my hopes for a successful repair as we went through every nook & cranny of the boat, I found quite a bit of historical documentation
. Everything from the original purchase records and the "unnamed" survey
to maintenance logs
, service manuals
and a receipt for a new cylinder head, gasket
, etc- from 1991. The record
indicated the motor
had 750 hours on it at the time.
Anyhoo~ So I pop the top on the old 1 cylinder and to my surprise I see... clean. Bore looked good, valves looked okay, block & head surfaces looked true
I was stoked. I spent the next two weeks hunting a head gasket. I had failed to take into consideration the gravity of buying
a 38 year old vessel and maybe, just maybe, I wouldn't catch hell finding repair parts
Yeah, well I found a gasket but it was a major PITA and they are fetching a premium these days. Back in 91 that gasket went for $2.80. Fast forward to 2015 when parts
production for this little pig ceased in 1980. Yip, so that gasket is now $25. Oh, and you have three in stock? I'll take two, thanks!
So anyhow, I cleaned everything up real good, hit it with a bit of paint
, and put er back together per specs. Set valve lash cold at .008 and torqued the head to 88ftlbs. Cut gaskets for the raw water
and sealed that all up with "Super Gray". I found a good deal of water
and sludge in the primary filter and lots of water
in the secondary filter but I made sure the tank was clean, topped off the tank, bled out all the watery fuel
and requested of the Admiral to grab the key and crank er up.
Purrin like a kitten!