Am I propped wrong??
09-03-2010, 01:31 PM
#12
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I have a Rinker 236 with a 502EFI Mag and use a 3 blade 21 Pitch Mercrury Mirage and run 4800 RPM's . When I use a 23 Pitch it drops me down to 4500 RPM's. So I would also suggest dropping down to a 21.
It use to be that Mercury Marine gave out blue colored props to Marinas as for ppl to try so they could decide which prop worked best for them . Don't know if they still do it though . You'll have to ask your local marine shop about that.
A 4 blade prop is popular for ppl who like better hole shot and quicker planeing. Although I do know some ppl who swear they get better top end from a 4 blade . I tried one and it took off 3 MPH off my top end.
Also with those motors I believe Mercury suggest you use a Solid Hub prop because of the torque the Mag motors put out.
It use to be that Mercury Marine gave out blue colored props to Marinas as for ppl to try so they could decide which prop worked best for them . Don't know if they still do it though . You'll have to ask your local marine shop about that.
A 4 blade prop is popular for ppl who like better hole shot and quicker planeing. Although I do know some ppl who swear they get better top end from a 4 blade . I tried one and it took off 3 MPH off my top end.
Also with those motors I believe Mercury suggest you use a Solid Hub prop because of the torque the Mag motors put out.
09-03-2010, 01:33 PM
#13
I have a Rinker 236 with a 502EFI Mag and use a 3 blade 21 Pitch Mercrury Mirage and run 4800 RPM's . When I use a 23 Pitch it drops me down to 4500 RPM's. So I would also suggest dropping down to a 21.
It use to be that Mercury Marine gave out blue colored props to Marinas as for ppl to try so they could decide which prop worked best for them . Don't know if they still do it though . You'll have to ask your local marine shop about that.
A 4 blade prop is popular for ppl who like better hole shot and quicker planeing. Although I do know some ppl who swear they get better top end from a 4 blade . I tried one and it took off 3 MPH off my top end.
Also with those motors I believe Mercury suggest you use a Solid Hub prop because of the torque the Mag motors put out.
It use to be that Mercury Marine gave out blue colored props to Marinas as for ppl to try so they could decide which prop worked best for them . Don't know if they still do it though . You'll have to ask your local marine shop about that.
A 4 blade prop is popular for ppl who like better hole shot and quicker planeing. Although I do know some ppl who swear they get better top end from a 4 blade . I tried one and it took off 3 MPH off my top end.
Also with those motors I believe Mercury suggest you use a Solid Hub prop because of the torque the Mag motors put out.
09-04-2010, 01:07 PM
#14
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Im trying to trade a 23p Mirage Plus for a 21p if that could somehow help. Thanks, Rob
http://www.offshoreonly.com/forums/s...us-rh-21p.html
http://www.offshoreonly.com/forums/s...us-rh-21p.html
09-05-2010, 12:58 PM
#15
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Alright, just tried out a 21p 3blade. Not impressed, I felt way under prop. The first thing I noticed was a lack of bite, I knew my hole shot would be slower but I had to rev to 4000 rpms just to get on plane, I think I was slipping a lot. Once i was cruising and went for top speed I stopped at 4800 rpm, I wasn't at WOT. But I didn't want to push the engine any more than that. As for top speed I was able to get to about 57gps (top with 4blade23 was 54). So I'm thinking that going with other suggestions of a 23p. Any other suggestions from people way more qualified than me, haha!
09-05-2010, 02:20 PM
#16
Alright, just tried out a 21p 3blade. Not impressed, I felt way under prop. The first thing I noticed was a lack of bite, I knew my hole shot would be slower but I had to rev to 4000 rpms just to get on plane, I think I was slipping a lot. Once i was cruising and went for top speed I stopped at 4800 rpm, I wasn't at WOT. But I didn't want to push the engine any more than that. As for top speed I was able to get to about 57gps (top with 4blade23 was 54). So I'm thinking that going with other suggestions of a 23p. Any other suggestions from people way more qualified than me, haha!
09-05-2010, 03:26 PM
#17
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any boat with a stock big block or stock small block in the range of 19 to 23 ft with a v-8 and has 1.50 gears in drive is going to run a 21-23 p prop in a 3 blade, but my guess would be a 21 p in a good clean stainless. its got to be a 14.5 or 143/4 diam. prop
09-05-2010, 08:19 PM
#19
I believe the laser is a small diameter, hence the reason for so much slip. If you go with a 23, go with a laser, or else you will open up another can of worms, if you go with a larger diameter 21 with a lot of cup such as a mirage plus, the slip will probably be gone, if you go with a large diameter 23, you may not turn the RPM's ya want.
