Just had the best of this week cruising down to Boston and back in ChrisDanRa. Next to the steering (see other post) what's the best way to silence an inboard engine. Mine is a yanmar twin cylinder desiel that is river cooled and there doesn't seem to habve any silencing and it is difficult to even talk to each other when running.
I'm going to add some sound proofing around the engine but a lot of the noise seems to be coming from the exhaust and water outlet.
Any ideas to quieten this down would be appreciated.
and loads of lead based sound proofing. Just watch the air intakes.... while you are at it, seal the engine bay and refit the air intakes outside the cockpit.
For sound proofing to be effective, you have to do the whole thing... think of making the area water tight. The smallest gap, hole or crack and the sound will flood out!!!
I have a slab of quietlife soundproofing hanging between my engines and that takes a surprising amount out, it cuts the noise bouncing off the other engine and back out, I sound-proofed the compressor at work and accidently over-ordered..... Other options include turing the stereo up and drinking more!
No, the only size issue is the diameter of the inlet and outlet. Saying that, many have stepped fittings so will take multiple sizes. Go for the biggest one you can fit/afford.
Just watch out for potential syphoning back in to the engine. Where those systems are designed as part of the engine system, they often have a siphon loop or a small hole to break the syphon.
here's another question for the intelligent
Posted - 11 Jul 2013 : 22:47:03
