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Jan 23rd, 2013
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150 HP Evinrude not reaching RPMīS #12677309
03/17/18 08:21 PM
03/17/18 08:21 PM
Joined: Mar 2018
Posts: 7
A
AHF Offline OP
Green Horn
AHF  Offline OP
Green Horn
A

Joined: Mar 2018
Posts: 7
Hi everyone!

I just bought a Champion 18ī6 bass boat With a 1993 150 HP Evinrude Ocean Runner (20" gear case) seated on a 6" jack plate with a 14-1/4 x 23 Alumunium propeller.

The compression test result was 115-120 lb on each cylinder.

The hole shot is excellent ,but the top speed is just 45-47 MPH and just reach 4700 RPmīs

Where should I Start to make changes to reach 5400-5500 RPMS and increase my MPH??

I did Rise the motor with the jack plate 2" but I did not perceived substantial changes
.
Thanks in advance.

Re: 150 HP Evinrude not reaching RPMīS [Re: AHF] #12678144
03/18/18 05:18 PM
03/18/18 05:18 PM
Joined: Dec 2013
Posts: 306
Plano, TX
P
PlanoPaul Offline
Angler
PlanoPaul  Offline
Angler
P

Joined: Dec 2013
Posts: 306
Plano, TX
Sounds like you are running on 5 cylinders. Verify you have spark on all plugs at ALL rpms. If so, then move to the fuel side. If this is a carbureted motor, i’d say check all your main jets and make sure you don’t have a blockage somewhere.

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