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Search: Posts Made By: donald
Forum: Engines 04-29-2017, 02:25 AM
Replies: 8
Views: 3,343
Posted By donald
Thanks shrew! Get'n old sucks! Yes I know...

Thanks shrew!
Get'n old sucks!
Yes I know about the change in pitch!
I tried Mercruiser prop selector, but it gave larger diameter and less pitch than what I have now! So was trying to find out...
Forum: Engines 04-28-2017, 02:37 PM
Replies: 8
Views: 3,343
Posted By donald
There was a time (way back when!) that I could...

There was a time (way back when!) that I could remember things,just a passing glimmer now!
Anyway I remember that a prop diameter change of 1 inch would relate to x change in RPMs! Just can't...
Forum: Engines 04-26-2017, 05:54 PM
Replies: 8
Views: 3,343
Posted By donald
Thanks Mike! That is what I was thinking, but...

Thanks Mike!
That is what I was thinking, but thought I would get some input from others!
I have an old 14.5x17p that I am going to try that is not in the best of shape that I keep as a get home...
Forum: Engines 04-26-2017, 03:26 AM
Replies: 8
Views: 3,343
Posted By donald
Thanks Mike! I was looking RPM differences. I...

Thanks Mike!
I was looking RPM differences.
I know that 1 inch in pitch = about 200 RPMs, but I know that an increase or decrease in diameter will change max RPMs, but how much per inch change?
As...
Forum: Engines 04-25-2017, 05:09 PM
Replies: 8
Views: 3,343
Posted By donald
Prop diameter

OK I am old and forgetful so be easy on me!
I am looking for info on what effects prop diameter has on RPM?:confused:
I have used Mercruisers Prop Calculator and it states that I need a 15 or 16...
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