Which prop 21v

[lui73]

hi, i´m from germany and here are tigé boats not so popular. we are driving a 2000 21v riders edition with a mag 350 mpi.
our boat has top speed of only 34mph /55km/h by 4000rpm. can anybody tell me which prop is standard, because i think there is something wrong... thanks.
by the way gas is here 10$ a gallon

[laserfish]

I have an Acme 381, 13.5x17.5. Probably a little too much top end. If I had ballast tanks, I would probably need a little more prop. We board at about 2800 rpm, 21.5 mph with this prop.
Acme can help you out, great prop.

[laserfish]

Hey Dogbert, you have the same boat, what are you running?

[TeamAllen]

Welcome to the site! Post some pictures when you get a chance.

Those RPMs are low. You are right you will need a new prop. You can email ACME Propellers, from their contact info, on their website. They will need to know all of your info about your boat.

http://www.acmemarine.com/

[Waterski-Rebel]

lui73 - where do you live? Do you know your alt?

[tabone1]

I have a similar boat (315 HP). It has a gear reduction V drive so I had to go with a different prop than dogbert. I got an ACME part #1237 size 13.5 x 14.25 4 blade prop with a 1.5 cup. Just picked it up Friday based on a recommendation from Jim at Acme Marine. I can not believe the difference in performance. The prop it replaced was an OJ 14 x 18. I was topping out around the same speed as you prior to the new prop. I just pulled the boat out of storage and only have had time for a quick rip across the lake so I am not sure how it is with balast but the boat was running like it had an extra 150 HP It jumped up to 43 in a hurry before I backed off on the throttle. Based on some other threads, I think the way to tell if you have the gear reduction is by the color of the V-drive. Mine is blue with a 1:1.5 ratio and it sounds like the 1:1 drives are black.

[R&T Babich]

I think we have an identical boat to yours. Our V-drive is a Walter Gear Drive RV-26D, 1.46:1 ratio painted blue. If your V-drive is painted black it would be a 1:1 ratio which would require a different prop. Our original prop was an OJ 14"-18 pitch. I don't know if our boat will do the max RPM listed on the engine (4800-5000 RPM) because I've never pushed it that high. It does run around 35 MPH at 4000 RPM. I recently installed an Acme #537 13.5"-16 which is what Acme recommended for our boat. We do not have ballast. I'll be going out in 2 weeks for the first time with the new prop and see how it does. Our friend's 2004 Malibu came with an Acme #537 as do some newer Tiges. It probably wasn't put on our boats because the Acme #537 wasn't available until around 2003.

[lui73]

Thank you very much for your help . The Walter Gear Drive is painted black. I´m not sure but i think have seen the following numbers on our prop before going into the water: 13x13,5 / 1 1/2
Next week we will put the boat out of water to clean then i will take a look.

[dogbert]

Hey Dogbert, you have the same boat, what are you running?

I'm running an Acme 525, I really like it. I had a thread around here somewhere.

[Aalapuna]

hi, i´m from germany and here are tigé boats not so popular. we are driving a 2000 21v riders edition with a mag 350 mpi.
our boat has top speed of only 34mph /55km/h by 4000rpm. can anybody tell me which prop is standard, because i think there is something wrong... thanks.
by the way gas is here 10$ a gallon

Had similiar issue as you. Sluggish hole shot and top speed of 37mph. I just put Acme 13.25 x 15.5 (857). Jumps out of the hole and tops @ 49mph...amazing difference!

[dogbert]

Thank you very much for your help . The Walter Gear Drive is painted black. I´m not sure but i think have seen the following numbers on our prop before going into the water: 13x13,5 / 1 1/2
Next week we will put the boat out of water to clean then i will take a look.

Ok, you have the 1:1 Walter V-Drive. I have the same model. Get the Acme 525. Here's the thread I started on it: My new 3-blade prop

[lui73]

OK, i ordered a new prop from acme. They told me to try the acme911 / 3 blade. Next time on water i will see... i let you know how it works!
Thanks again for your help.

[gitair]

Where is the best place to buy Acme props?
I also am going to put on a #537 for better fuel economy and prper power range usage.

[dogbert]

Contact SPBFAN, he seems to know how to get deals.

[samw]

Kinda
What do yo guy do if your traveling a good distance, as far as your prop.
Do you leave it on hte boat or do you you pull it off. Why I ask just wondering if anyone had issues geting dinged up by some road crap.....

Thanks