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Low rpms at full throttle

swatski

Jetboaters Fleet Admiral
Messages
8,576
Ratings
9,222 137
Points
493
Location
Saint Louis, MO
Boat Make
Yamaha
Year
2016
Boat Model
AR
Boat Length
24
#2
max rpms are only around 7000 with two people. Max speed is 47mph.
That's very unusual in that 47mph would typically require spinning the impellers at about 7,500+ RPM or so, definitely more than 7,000... Are your impellers original/OEM or have been replaced? It would seem you may be "overpitched" but that is very unusual, I would think.

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Stevenpigsooie

Jet Boat Lover
Messages
105
Ratings
109 1
Points
73
Location
Beaver Lake, Arkansas
Boat Make
Yamaha
Year
2016
Boat Model
AR
Boat Length
24
#6
My 2016 ar240 maxes out around 7300 rpm and will get to 47 mph with full tank and 2 adults. I’d like to get out there by myself and 1/4 tank of gas and see if I can get to 50.
 

Hilario Perez

Well-Known Member
Messages
215
Ratings
86 1
Points
48
Location
Kissimmee FL.
Boat Make
Yamaha
Year
2011
Boat Model
SX
Boat Length
24
#8
I'm having that same problem also my starboard motor comes out at 7000 RPMs and little by little goes to 6800 RPMs my port side motor runs at 7300 RPMs when no problem it just started doing that recently anybody got any ideas for what I need to look at.
 

swatski

Jetboaters Fleet Admiral
Messages
8,576
Ratings
9,222 137
Points
493
Location
Saint Louis, MO
Boat Make
Yamaha
Year
2016
Boat Model
AR
Boat Length
24
#9
My 2016 ar240 maxes out around 7300 rpm and will get to 47 mph with full tank and 2 adults. I’d like to get out there by myself and 1/4 tank of gas and see if I can get to 50.
Same here, on a hot day. I think, just about.

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JeffVans

Well-Known Member
Messages
300
Ratings
231 4
Points
53
Location
Zion Crossroads, Va
Boat Make
Yamaha
Year
2016
Boat Model
242 Limited S E-Series
Boat Length
24
#10
My 2016 ar240 maxes out around 7300 rpm and will get to 47 mph with full tank and 2 adults. I’d like to get out there by myself and 1/4 tank of gas and see if I can get to 50.
I had my '16 242LSE out the other day with the bimini canvas off and about 1/3 tank with just me on it and finally hit the 50mph mark for the first time only lasted a couple seconds though lol. I'm not sure what the rpms were I'd guess around 7300ish.
 

Hilario Perez

Well-Known Member
Messages
215
Ratings
86 1
Points
48
Location
Kissimmee FL.
Boat Make
Yamaha
Year
2011
Boat Model
SX
Boat Length
24
#11
I had mines on the water this weekend and I was at 7500 RPMs once I took the filters off both RPMs are exactly the same and the boat been getting up to 50 and 51 miles per hour I also had seven people on my boat this weekend I was getting 48 to 49 miles per hour just FYI haven't put the filters back yet don't know if I can keep driving the boat like that without the filter. If anybody got any suggestions or advice I'm open.
 
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