Does your engine have bad breath?

[mr c]

Hey bill,
You need to read the yanmar manual. It specifically state to do exactly what I stated. Not my words (yanmars)

 

[robertsapp]

Try checking the mixing elbo maybe the mixing elbo is slightly clogged and some of the exhaust gases some how is leaking in the rear berth.
If you cleaned the mixing elbo will help the engine and boat to perform better any way for sure.
Nick

As part of putting an entirely new exhaust system on the boat last year, I replaced the exhaust riser, coupler, and mixing elbow. They're all brand new, probably less than 15 hours on them.