Bill, Mine was smoking a bit last season too but I attributed it to an incorrectly adjusted Max-prop. My hypothesis may have mislead me to not recognize a low power condition.
Anybody ever use any of the snake oil products that are supposed to free stuck rings? "Rislone Compression Restore and Ring Seal" is just one of many I came across. The ones you pour in the cylinder seem more legit than the ones you add to the oil. Josh On Apr 11, 2014 10:48 AM, "Bill Coleman" <colt...@verizon.net> wrote: > This is very interesting. > > The Landfall 39 here in Erie that Lloyd Lippe in TX bought smoked a lot. > The Previous owner was a C&C dealer in the day, and had a yard. I talked to > the manager once, he said they did everything to this engine to figure out > the smoking problem and could never solve it. I'll bet you are right on > about the stuck rings. I am not sure if it ever cleared up for Lloyd. > > > > Bill Coleman > > C&C 39 > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of * > bria...@aol.com > *Sent:* Friday, April 11, 2014 8:10 AM > *To:* cnc-list@cnc-list.com > *Subject:* Re: Stus-List Yanmar 3HM35F low compression > > > > A thought on Josh's 3HM35F engine issues.... > > > > My "new to me" boat had been on the hard for years (4+, at least), and > required a emptying and cleaning of the fuel tank, new filters, and a > rebuild of the injection pump just to get my YANMAR 4JH-TE started. It > seemed to run fine, and we ran it for many hours at various speeds > dockside, then changed the oil and filter again. > > > > Still more smoke than I would like in the exhaust. In any case, pressed > for time, I set out for return to Virginia from Gulf Coast, Florida. In the > first 8 hours of running time, used more than 1/2 quart of oil, then > something changed. Less smoke in the exhaust, much more power, smoother > idle. > > > > From that point on used no more oil on the whole trip up to Virginia. At > least 65 more hours of running time. > > > > I suspect my engine had stuck rings, and that the combination of running > it and fresh oil "unstuck" them. Perhaps this applies to Josh's engine, as > well, although I'm not sure how he can run it if it won't start. According > to my diesel mechanic, the engine should start and run with the compression > he has, just won't produce much power, and may smoke. I'm thinking his > starting problem is elsewhere and would suspect the injection pump. > > > > Bill > > > > *MYSTY* > > Landfall 39 > > > > Virginia > > > > In a message dated 4/11/2014 5:19:11 A.M. Eastern Daylight Time, > muckl...@gmail.com writes: > > Hey folks, > > It appears that I have low compression (130psi and 160psi) on 2 > cylinders. During the first start of the season the engine started rough > and powered the boat just long enough to get to the travel lift and then > stalled when I throttled down. I did not attempt to restart because I was > in the lift well. Upon relaunch, 5 days later, the engine just won't > catch. It kinda acts like it wants to, which I assume is the single > cylinder that has enough compression to fire. > > An additional symptom was unusually high crankcase pressure as indicated > by the dipstick that ejected from the engine. A zip-tie was enough to > secure it for the trip to haul-out. > > I have ensured fuel and spray pattern. Changed and cleaned injectors. > Tried starting fluid. Attempted to use hot air at the air intake. > Cleaned/removed air cleaner. Checked valve lash/operation. Checked > exhause elbow. Checked compression. > > Stuck rings seem to be the most common diagnosis. Any thoughts or > suggestions would be appreciated. > > I think the bigger decision for me and the question for y'all is, what > should I do from here. Rebuild? Replace? If I replace should I modernize > or stick with a remanufactured 3HM35? If I modernize, should I stick with > 30hp or go for something bigger. I fear that anything other than a 3HM35F > will cause delays due to configuration and fit. Is it worth it or is that > fear unfounded? If I rebuild should I do it myself? I fear a long > turnaround and more delays. > > As you can probably tell I am leaning towards replacing with a > remanufactured 3HM35F but I also don't want to miss other opportunities. > > Thanks, > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Yanmar 3HM35F > Solomons, MD > > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > >
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