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It is currently Mon May 12, 2025 3:38 pm
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[ 8 posts ] |
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mudder
MMT Pro Member
Joined: Sun Jan 25, 2009 11:25 am
Posts: 401
Location: Wisconsin
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 PD Prop, Replace or not? My prop on 2008 PD has not been replaced in two years and while the cup does not look as deep/ wide(looks worn), the prop measures tip to tip 12-3/8". RPMS WOT run normally 4200, but now is closer to 4000 and when loaded it was around 3700/3800. Also notice I have to have it trimmed higher than normal to throw a normal rooster tail. Empty it seems to run pretty good, but still not the RPMS I would expect at normal trim level.
WOT in neutral was 4250/4275 so RPMs out of water looks good.
What is confusing me is the tip to tip measurement looks good, but it acts like the prop needs replacement from past experience.
Time to replace the prop?
Thanks
_________________
Phowler Extreme 1848 with 36PDFPR
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| Fri Sep 12, 2014 7:12 am |
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JLACOUR
MMT 1000 Club
Joined: Wed Jan 14, 2009 8:18 pm
Posts: 4915
Location: Lake Jackson, TX
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Re: PD Prop, Replace or not? Less prop = more rpms. Sounds like you have something else going on.
_________________
37 PD EFI FPR 18x48 Tiller
SOLD -- 36 PD EFI FPR 18x48 Stick Steer
SOLD -- 27 PD FPR 16x36 Skiff
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| Fri Sep 12, 2014 7:22 am |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm
Posts: 16915
Location: Rowlett, TX
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Re: PD Prop, Replace or not?
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| Fri Sep 12, 2014 9:05 am |
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JLACOUR
MMT 1000 Club
Joined: Wed Jan 14, 2009 8:18 pm
Posts: 4915
Location: Lake Jackson, TX
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Re: PD Prop, Replace or not? Ah missed the part about the tail
_________________
37 PD EFI FPR 18x48 Tiller
SOLD -- 36 PD EFI FPR 18x48 Stick Steer
SOLD -- 27 PD FPR 16x36 Skiff
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| Fri Sep 12, 2014 9:07 am |
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mudder
MMT Pro Member
Joined: Sun Jan 25, 2009 11:25 am
Posts: 401
Location: Wisconsin
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Re: PD Prop, Replace or not? Thx...it certainly has the symptons of worn prop. Can the cup wear down without affecting tip to tip measurement? Thats my biggest question unless Im not measuring correctly.
_________________
Phowler Extreme 1848 with 36PDFPR
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| Fri Sep 12, 2014 9:18 pm |
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270Handiman
MMT 1000 Club
Joined: Thu Dec 29, 2011 10:46 pm
Posts: 2342
Location: Mandeville, LA
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Re: PD Prop, Replace or not? It may be the prop....but i'm betting leaking valves. Might be time to have a leakdown test done.
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| Fri Sep 12, 2014 11:55 pm |
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dead animal
MMT 1000 Club
Joined: Fri Jan 16, 2009 3:18 pm
Posts: 1726
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Re: PD Prop, Replace or not? check your throttle linkage. it may not be opening the govenor up enough under a load. over time they wear out and will make u chase your tail.
like the other guy said, a leakdown test will tell u what's going on with your valves and is easy to do.
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| Sun Sep 14, 2014 7:02 pm |
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JLACOUR
MMT 1000 Club
Joined: Wed Jan 14, 2009 8:18 pm
Posts: 4915
Location: Lake Jackson, TX
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Re: PD Prop, Replace or not? Also check your boat for hooks
_________________
37 PD EFI FPR 18x48 Tiller
SOLD -- 36 PD EFI FPR 18x48 Stick Steer
SOLD -- 27 PD FPR 16x36 Skiff
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| Sun Sep 14, 2014 9:57 pm |
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