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RPM Inconsistencies

YinzerVRX

Active Member
Messages
5
Reaction score
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42
Location
Pittsburgh
Boat Make
Chaparral
Year
2016
Boat Model
VRX
Boat Length
20
Hi All,

I'm new to boating and jet boats in general. I currently own a 2016 203 VRX with twin 150's. I've taken it out on the water 3 times since I bought it and noticed the top end RPM seems to vary. The first day out she was turning around 7200 and same with the second outing. I had her out today and she only topped out at 6900-7000. I used the same Pump BP 89 octane fuel each time I gassed up. The manual says it should be maxing out at 7550 but never seen that. Any reason to why I'm seeing low RPM's?
 

itsdgm

Jetboaters Admiral
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Location
Rancho Santa Margarita, California
Boat Make
Yamaha
Year
2007
Boat Model
AR
Boat Length
21
Assuming that you bought the boat used, One simple thing to change out would be the spark plugs. It's common for guys to use fogging oil during long periods of storage. So it could be possible that the plugs are fouled.

Anyway, hope you figure it out. Welcome to the site and congrats on the boat!!!
 

Vandyman

Jet Boat Addict
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Location
Brentwood, TN
Boat Make
Chaparral
Year
2015
Boat Model
VRX
Boat Length
22
I have the 223VRX with twin 200's and RPM seems to max out around 7200. At about 40 hours I have yet to see anything above 7200. It does have a limiter that limits RPM to 6800 or so until 10 hours are logged.
 

YinzerVRX

Active Member
Messages
5
Reaction score
3
Points
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Location
Pittsburgh
Boat Make
Chaparral
Year
2016
Boat Model
VRX
Boat Length
20
Thanks for the reply's. Yes I bought the boat used with 13 hrs on it. I'll have to look at the spark plugs to see what they look like. Where I live gas stations typical change to the " winter blend" October 1st. I'm thinking this could have an effect too.
 
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