I question even the need for an air filter on these boats. My Nanni Kubota came with a tuned intake, a plastic piece that I think is supposed to cut down on the noise, but it looked like the opening of a clarinet. No screen or paper or anything. And my current I'd be just has a simple screen over the turbo, about 6 in diameter by 2 inches wide. Looks like it would keep flies out, but not smaller bugs if they should should be so unlucky as to to get in the engine compartment. As I mentioned before, the oil in my boat is clean as a whistle, as compared to the Kubota in my lawn mower which is black as tar after probably 100 hours, because of the filthy air, even with a pretty good paper air filter.
Thanks Bill Coleman Entrada Erie PA On Tue, Jul 19, 2022, 09:35 Robert Abbott via CnC-List < [email protected]> wrote: > I mentioned this a few weeks back....mid June my Yanmar 2 GMF was > producing black smoke when starting up and would not rev above 2,100 RPM's. > > Late last season, I decided to do some regular maintenance and checked my > air filter....there was no air filter material...it had > disintegrated....didn't have a new one on hand so genius here cut a piece > of sponge and fitted it in the metal ring. Engine worked fine. But over > the winter the sponge more than likely absorbed some water which would > restrict air flow through it. > > I had a new Yanmar air filter on the boat which I got late last year and > never installed....changed out the sponge and replaced with new one, and > guess what, in neutral, the engine revived up to 3,400 ....ran the engine > in forward gear at the slip for another 20 minutes.... shut the engine > off...started again...revved up and down....engine works as it should. > > The problem was a lack of air....explains where the smoke was coming from > and the low RPM's....incomplete combustion because of restricted air flow. > > Rob Abbott > AZURA > C&C 32 -#277 > Halifax, N.S. > > > > > >
