You can see my solution in the video below. It is a clamp on style. Works good. Quieter actually. https://youtu.be/H-GI38vE4hQ
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Thu, Oct 31, 2019, 3:31 PM Bruce Whitmore via CnC-List < [email protected]> wrote: > Hello all, > > Some of you may remember a few weeks back I was inquiring about an > apparent lack of power on our 3JH2E. This was resulting in the engine, > when in forward, not getting up above 2,800 rpm when I used to be able to > get up to 3,200. > > Lots has been happening since then, as we figured out: > > A). We had a transmission problem (bearings spinning, trans slipping, > etc.) that required a rebuilt transmission. > B). I realized that my rather robust job of re-insulating the engine > compartment might be causing the engine to starve for air. > C). I removed a Panda generator in the port aft locker that was entirely > seized. That included removing and covering a very large air vent > measuring 11' x 7" in the side of the locker, meaning that if we were > really pooped by a large wave, the boat could ingest a big volume of water > while the cockpit drained. I subsequently heard you folks talk about > engine blowers, which my boat never had, and I overlooked. Had my boat > included a blower, I would have known not to entirely cover the vent. > D). The "intake silencer" noted in my Yanmar 3JH2E manual and which > looked mostly like a metal mesh/stainless cone with holes from the inside > is actually removable and has foam that is now clean. I got a reasonable > amount of crud out of it, but I don't want to say it was fully clogged. > > As we got this done, coincidentally the diver came by and cleaned the > hull. Here in the warm, shallow Tampa Bay area, we tend to grow stuff > pretty quickly in summer and fall, so the timing was perfect. Once we got > all this done we went out and motored and, with one of the engine side > panels removed to ensure good airflow (I've not yet addressed the vent > where the generator was as of yet), the engine will now go to 3,000 rpm in > gear, but still not to 3,200. It revs to 3,600 WOT at the dock in > neutral. Fuel filters are good, I don't think I have any air leaking into > the lines. I'll seriously look for black smoke under hard acceleration > thought I have not noticed it in the past. > > I want to start by eliminating the easy stuff. like improving airflow. I > tried to price out the filter with Yanmar, but they only sell the complete > silencer, metal casing and all for $132. Sigh. > > I can get green 65 PPI foam online, but there's always the quality issue > with Amazon. > > I can't seem to find an aftermarket K&N or other high performance filter > (which I would prefer instead of relying on foam). > > Once I'm 100% sure the airflow is not restricted, I'll make sure the > injectors are really clean, then move to timing & injector testing. etc. as > per your previous recommendations. > > What would you do about replacing the foam/filter? > > Thanks in advance, > > Bruce Whitmore > > > > > Bruce Whitmore > > (847) 404-5092 (mobile) > [email protected] > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
