Rpm question

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tha_runna

Cadet
Joined
Jul 23, 2011
Messages
11
Ive got a 94 225 ocean runner what kinda rpms should i see at full throttle? I was told today 5200 top end its doin 55-5600. Last motor had a 19p prop. This one has a 15x17. Prop is also getting cavatation burn on it. Boat is a 88 21 proline wac with a bracket. Any help is appreciated.
 
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oldman570

Lieutenant Commander
Joined
Mar 25, 2011
Messages
1,615
Re: Rpm question

Going to a 19p prop should lower your RPM to the recommended 5200 and will help with the cavatation problem I would think.
Oldman570
 
BonairII

BonairII

Commander
Joined
Jun 7, 2011
Messages
2,727
Re: Rpm question

Can the motor be lowered a tad to help with the ventilating problem?
 
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tha_runna

Cadet
Joined
Jul 23, 2011
Messages
11
Re: Rpm question

As far as lowering goes the cavitation plate is in line with with the hull of boat i already feel the motor sits too low due to the way water loads up behind it after i come off plane
 
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tha_runna

Cadet
Joined
Jul 23, 2011
Messages
11
Re: Rpm question

thank you for the help guys. I out a 14 3/4 x 19 on and new plugs and water tested and I'm pretty happy with it rps are around the 5200 range.
 
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