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STBD engine has a breathing problem?
Posted: June 16th, 2025, 1:27 am
by Pha8
2002 Carver 6.2mx Mercruisers
Twin 6.2 mx Mercs, stbd engine has a loud "hiss"?? Not sure if it has a air leak (Vaccume) or filter is dirty? Port engine sounds normal.
Any thoughts?
Re: STBD engine has a breathing problem?
Posted: June 16th, 2025, 2:38 pm
by km1125
Are your spark arrestors clean? If not, remove them and clean them both.
I'd be checking hose connections too. Perhaps a vacuum hose has become dislodged.
I'd also look into the IAC valve and it's associated "filter".
Re: STBD engine has a breathing problem?
Posted: June 16th, 2025, 8:49 pm
by bud37
Pha8 wrote:Source of the post 2002 Carver 6.2mx Mercruisers
Twin 6.2 mx Mercs, stbd engine has a loud "hiss"?? Not sure if it has a air leak (Vaccume) or filter is dirty? Port engine sounds normal.
Any thoughts?
Considering your other issues from the CO post may I suggest having a certified marine mechanic have a look at your boat and perhaps recommission it. This may give you an another experienced eye on things and perhaps notice something missed and save time hunting around.
A vacuum leak that loud would have the engine running poorly IMO.....could be the belt or one of the pulleys/idlers......check the inside of the belt for cracks in the ribs, if so scrap it and keep for a spare. By all means clean the flame arrestors anyway.