1989 evinrude 225 wot rpms/prop

[cornholio]

Hello. I've got a '89 Evinrude 225 pushing a 23' 1979 Powercat (looks like a Mako cuddy cabin despite the name). <br />I have two questions-What should my WOT rpms be? I currently hit 5000.<br />Also, the stainless prop (don't know the pitch) has two quarter inch irregularities (1/4" long and 1/4" bowed out from the blade edge) in two of the prop blades where the previous owner hit something. Do these affect performance much? <br /> Thanks.

 

[D5GT]

Re: 1989 evinrude 225 wot rpms/prop

I'asked same question about week ago and got answer: "shoot for 6000 rpm, at awerage load"

 

[cornholio]

Re: 1989 evinrude 225 wot rpms/prop

D5GT,<br />What kind of rpms are you running at WOT?

 

[phatmanmike]

Re: 1989 evinrude 225 wot rpms/prop

i have same motor, on a 21' center console. with a 19p prop, i hit 5800 rpms at 52.6 mph

 

[D5GT]

Re: 1989 evinrude 225 wot rpms/prop

21' boat<br /><br />19p OMC-aluminium prop 6000+ rpm/ 48 mph (GPS)<br />23P Rapture SST 5200 rpm / 55 mph (GPS)<br /><br />I'm trying to get aroud 6000 rpm.<br /><br />I'm lookin best prop/engine height... now engine is too low... I'm waiting 19" SST, let's see what kind speed/rpm I'll get.. expecting around 6100 rpm and 55 mph. Most likely 21" would be better for my boat.<br /><br /><br />myoutboards, wich prop you have? Raker?

 

[D5GT]

Re: 1989 evinrude 225 wot rpms/prop

Forgotten to say, if you have too "hard" prop, it will make fuel economy better, but most likely it will break the engine.<br /><br />(too much gas for low rpm)

 

[D5GT]

Re: 1989 evinrude 225 wot rpms/prop

Once more, for the first post:<br /><br />All damages at prop are fatal to bearings and gears! repair/replase soon as possible. Prop looses balace (and efficiency)