re-power...prop?

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jlh3rd
Posts: 28
Joined: Mon Aug 24, 2020 2:14 pm

Re: re-power...prop?

#16 Post by jlh3rd » Sun Nov 14, 2021 8:09 am

yes...thanks...I do understand what's involved in "pitching " ..translation?..money........If you read the thread from the beginning, you can see what I've done, and now because I lowered the motor which resulted in a good ,positive outcome....I'm back to square one.....
...There is no 14x13 ,4 blade. The 13.8x13 4 blade had such a massive ,negative difference from the 14x14, before I lowered the motor, ....I don't wanna try it again....I also tried a black max 14x13, 3 blade extra cup ...before I lowered the motor.....and blowout was almost as bad as the 13.8x13, 4 blade....
I was able send those back with full refund mainly because I used the original hub...didn't open the boxes and use those new hubs........
The boat is stored for the season, so no experimenting for now.....and I'll do off and on research through the winter.....
If there is a 15x12, 4 blade out there....I'll probably start with that next season.....

JEB
Posts: 28
Joined: Sun Feb 07, 2016 3:38 pm

Re: re-power...prop?

#17 Post by JEB » Tue Feb 15, 2022 6:13 pm

Why not take your prop to a shop and have them adjust your pitch to 13?
JEB
NEW-2019 Barletta L25UC
2019 Mercury 300 4 Stroke
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1985 Starcraft SD240
New to me-1998 Johnson 150 carbureted
Traded in-1979 Johnson 140
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Glen Rose, Texas

jlh3rd
Posts: 28
Joined: Mon Aug 24, 2020 2:14 pm

Re: re-power...prop?

#18 Post by jlh3rd » Wed Feb 16, 2022 9:21 pm

well, I've already purchased a hustler 14x13 4 blade
and this lets the merc 14x14 be my spare....

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Rick McC.
Posts: 419
Joined: Fri Mar 31, 2017 7:12 pm
Location: Weeki Wachee, Fl

Re: re-power...prop?

#19 Post by Rick McC. » Sat Feb 26, 2022 6:15 pm

Sounds like a plan. Hopefully it provides the RPMs you’re looking for…. :fasttoon
Rick

Sights are for the unenlightened.

jlh3rd
Posts: 28
Joined: Mon Aug 24, 2020 2:14 pm

Re: re-power...prop?

#20 Post by jlh3rd » Sat Mar 26, 2022 7:02 pm

update....I've discovered the hustler prop will not work as my gearcase is 4.75 inches. The hustler and now I know the other props I tried had 4.25 in. hubs...
So I have merc., black max, 3 blade, 16x13 on it and will find out come later april....
If it doesn't work.....I'm going to a spitfire, 4 blade 14x12.......

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Rick McC.
Posts: 419
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Location: Weeki Wachee, Fl

Re: re-power...prop?

#21 Post by Rick McC. » Sat Apr 02, 2022 12:29 pm

jlh3rd wrote:
Sun Nov 14, 2021 8:09 am
yes...thanks...I do understand what's involved in "pitching " ..translation?..money........If you read the thread from the beginning, you can see what I've done, and now because I lowered the motor which resulted in a good ,positive outcome....I'm back to square one.....
...There is no 14x13 ,4 blade. The 13.8x13 4 blade had such a massive ,negative difference from the 14x14, before I lowered the motor, ....I don't wanna try it again....I also tried a black max 14x13, 3 blade extra cup ...before I lowered the motor.....and blowout was almost as bad as the 13.8x13, 4 blade....
I was able send those back with full refund mainly because I used the original hub...didn't open the boxes and use those new hubs........
The boat is stored for the season, so no experimenting for now.....and I'll do off and on research through the winter.....
If there is a 15x12, 4 blade out there....I'll probably start with that next season.....
I did read your entire thread. That’s why I recommended dropping the prop pitch “1.”

Dropping your motor lower took care of the cavitation problems, and dropping the blade pitch will increase your WOT RPMs. Unfortunately; it’ll also drop your cruising speed at your previous cruising RPMs. Because of that, I didn’t prop my pontoon boat motors to reach their max rated rpms. I cared more about a decent cruising speed at 4000-4500 rpms. Why? Because I never run my boat motors wide open anyway, and a boat with only two regular ‘toons isn’t a planing hull design.

With the tri-toon I have now; it’s propped to hit max rpm, since achieving a good cruising speed at lower rpms is easy with a planing hull setup. Mine cruises at 30 mph on the gps at 4000 rpms.
Rick

Sights are for the unenlightened.

jlh3rd
Posts: 28
Joined: Mon Aug 24, 2020 2:14 pm

Re: re-power...prop?

#22 Post by jlh3rd » Sun Apr 03, 2022 7:01 am

that's exactly what I wanted to do except there is no 14x13, 4 blade ( I just found out) for my motor. I now have a new, unusable, hustler prop......
I'm propping my 'toon for people on board and tubing. So if I hit 6000 rpm's , or even a little higher, by myself.....then I should be in a good rpm range when loaded up....
.... Actually, if a 14x13, 4 blade would work, then 15x13, 3 blade would be the substitute needed by my calculations ....but I deferred to a recommendation by a propeller shop for the 16x13,3 blade......so now I'm playing the game I didn't wanna play....cha ching $...
if this 16x13 doesn't work......I'm putting the spitfire 14x12,4 blade on it an calling it quits....
...the fact that my gearcase is 4.75 in. makes prop choices selective and limited.....

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Rick McC.
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Re: re-power...prop?

#23 Post by Rick McC. » Mon Apr 04, 2022 8:06 pm

jlh3rd wrote:
Sun Apr 03, 2022 7:01 am
that's exactly what I wanted to do except there is no 14x13, 4 blade ( I just found out) for my motor. I now have a new, unusable, hustler prop......
I'm propping my 'toon for people on board and tubing. So if I hit 6000 rpm's , or even a little higher, by myself.....then I should be in a good rpm range when loaded up....
.... Actually, if a 14x13, 4 blade would work, then 15x13, 3 blade would be the substitute needed by my calculations ....but I deferred to a recommendation by a propeller shop for the 16x13,3 blade......so now I'm playing the game I didn't wanna play....cha ching $...
if this 16x13 doesn't work......I'm putting the spitfire 14x12,4 blade on it an calling it quits....
...the fact that my gearcase is 4.75 in. makes prop choices selective and limited.....
I think you’ll get it sorted pretty quick once your boating season starts. :thumbsup
Rick

Sights are for the unenlightened.

jlh3rd
Posts: 28
Joined: Mon Aug 24, 2020 2:14 pm

Re: re-power...prop?

#24 Post by jlh3rd » Fri May 06, 2022 5:32 pm

hmm....thought i gave my update here...
so, the black max 16x13 , 3 blade, gave me 27 mph (gps) at 6000 rpm...this was with the current and against the wind....
...it was windy and the river was rough....
running against the current but with the wind I saw about 58,5900 rpm and 25 mph..
...so I'm where i need to be
hope this helps

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Rick McC.
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Re: re-power...prop?

#25 Post by Rick McC. » Mon Jun 27, 2022 2:30 pm

jlh3rd wrote:
Fri May 06, 2022 5:32 pm
hmm....thought i gave my update here...
so, the black max 16x13 , 3 blade, gave me 27 mph (gps) at 6000 rpm...this was with the current and against the wind....
...it was windy and the river was rough....
running against the current but with the wind I saw about 58,5900 rpm and 25 mph..
...so I'm where i need to be
hope this helps
That sounds good! 👍
Rick

Sights are for the unenlightened.

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