I had just finished repairing the exhaust manidfold and elbow on the Volvo Penta, and the very first outing the crew reported a weird sucking noise coming from the rear technical area under the cockpit. Preliminary investigation found a pinhole in the muffler squirting salt water on any revs above 1500rpm.
After sweating and swearing an awful lot, I finally managed to get it out, hopefully effect repairs tonight and back in tomorrow.
Considering it is only 3yrs old, I'm not overly impressed with Volvo's alleged reliability, as that's now the manifold, exhaust elbow and the muffler.
We'll have a good look for any other weak spots after sand blasting it, I'm hoping we can find any other issues before re-installing, the space to work in is nowhere near as bad a some boats I've worked on ,but it's still a bitch fiddling with stiff exhaust hoses in a cramped space.

This was the exhaust elbow, you can see how badly it was blocked due to carbon buildup.

Seems pretty ordinary considering it's only just turned 3 and has been serviced at the regular intervals!
Remind me why do we have boats again ?