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6500 RPM Maximum on 252XE

jemorgan3

Jet Boat Lover
Messages
12
Reaction score
6
Points
72
Boat Make
Yamaha
Year
1999
Boat Model
LS
Boat Length
21
Having a RPM issue with my 252XE that I can't figure out. Ive replaced the impellers with impeller.com upgrades, replaced the plugs with LFR6A's and confirmed the oil level is good on both engines. Before all that, I was limited to 6500 rpm.. And after all the maintenance, still limited to 6500!!

Am I overlooking anything? im topping out at about 38 with just me on calm water..

Tried to look at making sure the throttle cable was adjusted correctly, but the E-series boats dont seem to have a cable at the throttle body. Do we have the ability to adjust the rpm on E boats?
 
IDK, but have you tried cruise assist? If the issue is your throttles, can you increase the RPMs that way? Looks like Cruise Assist functions up to 7k RPM.
 
I suspect you put in impellers with too much pitch. Especially if the engines were running at full rpm before you put those impellers in.
 
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