Page 1 of 3
Prop replacement
Posted: Wed Mar 10, 2010 9:06 pm
by Rodman
I saw this prop on ebay. Do you guys think this one will work for me?
http://cgi.ebay.com/ebaymotors/Brass-Bo ... iesQ5fGear
Posted: Wed Mar 10, 2010 9:26 pm
by foofer b
Price is right for sure. The pitting on the hub worries me. The prop looks like it has 14LH 9 originally stamped on it. with 10 stamped over it. That should do nicely for you. If it revs a little too high you can probably have another inch of pitch put into it.
Is your boat a LH engine/tranny? Did trojan make anything else in the F26
? Anyone out there know?
Posted: Wed Mar 10, 2010 9:28 pm
by foofer b
Silly me, I revisited your prop pics so disregard my LH question.
Posted: Wed Mar 10, 2010 9:45 pm
by Rodman
foofer b wrote:Silly me, I revisited your prop pics so disregard my LH question.
LOL
Posted: Wed Mar 10, 2010 10:06 pm
by prowlersfish
If you can get it cheap go for it
Posted: Wed Mar 10, 2010 10:38 pm
by rossjo
What shaft dia?
What Dia/Pitch do you have today?
Cupped?
Engine model/Torque/HP?
Boat Weight?
Posted: Wed Mar 10, 2010 11:26 pm
by Rodman
F26 1 inch shaft.
Posted: Wed Mar 10, 2010 11:44 pm
by rossjo
318 Chrysler?
Torque/HP?
Boat Weight?
26'?
Posted: Wed Mar 10, 2010 11:47 pm
by Rodman
318 Chrysler? No 351 Ford W
Torque/HP? 240hp
Boat Weight? Unsure
26'?[/quote] F26 express 26ft
Posted: Thu Mar 11, 2010 12:09 am
by rossjo
Gear ratio?
Need weight - approx 8,000lbs or what?
Posted: Thu Mar 11, 2010 12:24 am
by Rodman
rossjo wrote:Gear ratio?
Need weight - approx 8,000lbs or what?
V drive 1.1 5400lbs
Posted: Thu Mar 11, 2010 12:49 am
by rossjo
Per BoatDiesel.com (sign up for $25/year):
> Average Planing Hull
> 5400 lb
> 24' Waterline Length
> 1 engine
> 240 SAE HP
> 4,500 RPM
> 2,500 Cruising RPM
> V-Drive
> 1.1:1
> 3-Blade, Cupped
> 14" Diameter
RESULTS
MAX PERFORMANCE
Available Power: 232.8 SAE hp ( 173.6 kW) @ 4500 RPM
Max Speed: 32.2 kts
Fuel: 14 US Gall/Hr (typical)
CRUISING PERFORMANCE
Cruising Power: 48 SAE hp ( 35.5 kW) @ 2500 RPM
Cruising Speed: 14.6 kts
Fuel: 3 US Gall/Hr (typical)
RECOMMENDED PROPELLER
Diameter: 12.8 in. Pitch: 11.5 in.
Blades: 3 Cupped: Yes
Transmission Ratio Acceptable
PROPELLER BASED ON INPUT DIAMETER
Diameter: 14.0
Pitch: 10.0
Blades: 3
So, a 13x11.5 3-blade cupped is recommended, but a 14" diameters would be a 10" pitch.
I think you're engine is running weak - new points? Timing right? Good distributor? Carb opening? 4-BBL Carb? Motorcraft Carb?
Posted: Thu Mar 11, 2010 7:55 am
by foofer b
Rodman, you shpuld probably add 1000 lb to your estimated weight.
Posted: Thu Mar 11, 2010 7:59 am
by foofer b
Rossjo, will you please run my numbers up the flagpole and tell me what prop I need?
F26---6500lb clean bottom
Crusader 454 about 350 hp
Velvet drive 1:1 trans
Posted: Thu Mar 11, 2010 8:23 am
by rossjo
Gentlemen,
BoatDiesel.com is a paid service (just $25/year), and you really should join to get these numbers. As a subscriber, you're allowed to run 25 of these calculations per year. Paul (2010 Trojan Boater of the Year candidate) is also a member.
Foofer - what is the max dia prop you can run on that F26?
My personal Prop Calculator software says you need a 14x11 or 14x12 3-blade for that.
It says 13x11 3-blade for Rodman's boat, which correlates with BoatDiesel.com's recommended calculation of 12.8 Dia X 11.5 Pitch. Telling it Rdoman wanted to use a 14" dia, returned a 10" pitch to compensate.