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2008 AR210 Port engine chugging

JAlexMN

Active Member
Messages
7
Reaction score
3
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32
Boat Make
Yamaha
Year
2008
Boat Model
AR
Boat Length
21
I've had my Yamaha out four times this year, running great each time. We went out for a 5th time and the port engine is definitely making noise. Kind of a chugging sound. I've replace the spark plugs, made sure the oil is topped off, and even switched the coils to the starboard engine to see if the noise switches to the other engine. No difference.

Its obvious that I can't get it in for service and back before the holiday weekend. Anybody have any ideas on what it might be?
 

WREKS

Jetboaters Lieutenant
Messages
1,161
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Location
Port Saint Lucie, Florida
Boat Make
Yamaha
Year
2007
Boat Model
SX
Boat Length
23
Oil must be between F and L on dipstick. If it is higher than F, it will cause problems. When you say, "topped off," what do you mean?
 

JAlexMN

Active Member
Messages
7
Reaction score
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Boat Make
Yamaha
Year
2008
Boat Model
AR
Boat Length
21
Oil must be between F and L on dipstick. If it is higher than F, it will cause problems. When you say, "topped off," what do you mean?
It was above the L line but I added enough to just under the F line.
 

Dfred

Jet Boat Lover
Messages
50
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66
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Location
Fairfax Virginia
Boat Make
Yamaha
Year
2009
Boat Model
AR
Boat Length
21
Pull and inspect air filters? Or is it an exhaust back-pressure issue? Are you able to run YDIS for any trouble codes from the number of sensors that may be bad, etc?

I gather you have trouble-shot this down to engine, and ruled out drive-train (failed/binding intermediate bearings or any else)?
 
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