Prop Specs ONLY

[Zkdk3000]

Tried the 1229 out this weekend, and LOVE it! It's 13x11" 0.080" cup 3 blade.

WOT Unloaded: 4600RPM at 41.0MPH. Yes, it sped up and only turns 100 more R's than my old 209. I don't quite understand it, but it's true! The boat is "throw you out of the observer's seat" fast out of the hole now.

Surfed great with 1900lbs + 4 dudes all day. Decided to throw the long rope in with surf weight at the end of the day, and had NO PROBLEM getting on plane with 1900lbs of ballast and 4 dudes. I was blown away!

I don't love turning this old engine more RPMs all the time, but it sure does feel good...

It appears everyone is going to a 3 blade - even those that have always sworn by a 4 blade. Would you still say there is a considerably large positive difference between old 4 and new 3 for all around performance?

[rdvanput]

Thanks! I now realized I made an error in my original post. I have the PCM 40A transmission (1.23:1). Everything else is correct. Current prop is a 14x14 RH 3 blade ni-bral

[SquamInboards]

Ah, that makes sense, most of these boats (Correct Craft too) switched to the 1.23 in 1989.

I can't recall if it's been emphasized here, but you should definitely know that a new CNC prop will be smaller in diameter and possibly pitch, too. This is largely because the overall surface area is so much greater within the circumference of the prop. Does that make sense? I went from a 14x16 to a 12.5x14.25 (however, the prop had been rebuilt and material removed so the actual outside diameter measurement was more like 13". I took a picture comparing an old prop to a new one side-by-side, I'll post it here if I can find it.

[UKandH]

Resurrecting the old thread again.

1993 TS6M Comp
285 HP HO BOSS, GT head version with carb
1:1

Current prop is
13x13 original but is giving me poor hole shot and severe vibration compared to my friends TS6 Comp Classic.

Just ordered an ACME 541 13x12 0.08 cup

Used for Skiing, Slalom, Trick, Jump...very occasional wakeboarding....ABSOLUTELY NO BALLAST , 2 fat knackers in the boat is enough

Will post comparison when completed.

[UKandH]

1993 TS6M Comp
285 HP HO BOSS, GT head version with carb
1:1
LH Rotation

Right just fitted the new prop.

Old spec was

13 x 15 OJ prop
WOT 3800 RPM
42mph via GPS
Hole shot was poor.
Serious vibration on accel and cruise.

New spec

ACME 541 13 x 12 0.08 cup on a 1" shaft (good deal and great service from WakeMakers)...delivery to the UK within a week of order.
WOT 4300 RPM
V Max 44 mph via GPS with 2 passengers on board.
Hole shot ... OMG...takes off like a scalded cat with a rocket up its butt :O. I will time the 0 to vmax time later this week
Absolutely no vibration at all.

Wake seems very similar to before, no change in rooster position and no adjustment to wake plate.

Gotta love this prop

[Poorhouse]

1986 Supra Sunsport
240 HP 351
1:1
LH Rotation

Old prop was the original OJ. Slight vibration. I though it performed well but had no point of reference. We bought the boat this spring. My first experience with boats.
Had read many posts praising Acme props and people saying they with they had bought one sooner. Decided why wait?


New Prop.

ACME 543 from Nettle.
Quick shipping, good service and a free t-shirt.

We are skiers, no ballast. Decided on the 543 due to our elevation. Lakes we frequent are between 3000' and 5000'.

As stated above by UKandH:

Hole shot ... OMG...takes off like a scalded cat with a rocket up its butt
Absolutely no vibration at all.

I agree with this 100%. The change in acceleration is very noticeable. Both hole shot and when already cruising. Plus it is super smooth.

[dsthomas05]

Boat:
2007 Supra Launch 20SSV

Engine:
Indmar MPI-325
1.45:1 Transmission
13.5x17.5 4-blade, unknown cup

Performance:
4800 RPM WOT / 41mpg (unverified)
no ballast, wake plate at 50%, 2-3poeple + gear
Boat is used for skiing, wakeboarding, and surfer
Hole shot for skiing is pretty good, I don't give full throttle to most people
planing full loaded (1200lbs ballast plus 4 adults) is a little slow but it gets there
The top end doesn't seem much affected by the number of people, it seem like it will always do 39-41mpg


rpm/mph (wake plate 100% down)
3000/28
3500/32.5
4000/36
-> wake plate at 50% normally gives you 1-2mph at any RPM

I'm thinking about getting ACME 1591 14x16, 0.135 cup to see if I can gain a little on the bottom end without losing much on the top end or having a really high RPM when waterskiing.

Side note: Has anyone compiled this data?

A summary would be fantastic for anyone looking at getting a new prop.

[rcooley]

I have a 2008 20 SSV with almost the same specs. I need to replace my prop. Did you upgrade yours as you mentioned? If you did how do you like it?