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1.8 stumble

Evil Sports

Jetboaters Admiral
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Location
91 North/75 South
Boat Make
Yamaha
Year
2013
Boat Model
SS
Boat Length
21
I love my 2013 212, the 1.8s really do a great job on this platform but I wonder whey they have this stumble.
I know its nothing bad but it seems a bit violent, Why do they do this?
 

Matt Phillips

Jetboaters Captain
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Location
Lake Tahoe
Boat Make
Yamaha
Year
2017
Boat Model
242X E-Series
Boat Length
24
It sounds like they are running out of the water. I think that sound is because in that case there's no load on the pump out of the water. Mine do that but once they are in the water they don't make that stumble.

Just a guess though
 

FX195

Jet Boat Addict
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Bradenton, FL
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Yamaha
Year
2018
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AR
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19
Those engines are known to have a lopey idle, seems normal to me. I had a 2015 Waverunner VXS with that engine, it always idled like that since new. A friend had a 2014 and it was the same.
 

Zizzou 192

Jet Boat Junkie
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NY
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Yamaha
Year
2015
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SX
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My idle sounds the same.

Assumed they were trying to make it sound like its motorcycle engine cousins.
 
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