Alpha One Prop selection

[MarkB05-200]

Try a 4 blade aluminum prop
15 or 17
4 blades usually work better on a heavy boat it will give you more lift than a 3 blade
I only used a high 5 once and had too much motor for the pitch we had so I can’t speak to your current prop other than it’s to big

I would not go with anything aluminum. You just lose too much efficiency with them.

BBP, I have an aluminum 4 blade Solas Rubex that is a 19 pitch. It was free and just laying around. If it is an RPM issue from the prop, the 19 pitch should be a good start and possible indicator right?

[MarkB05-200]

Do you dock or trailer the boat?
If it’s docked stainless props have a tendency to cause electrolysis on the outdrive and if you’re not sure on the pitch a lot cheaper
I prefer Stainless as well but have run Mercrusier 4 blade 22 on my old chaparral

I have only been able to take her out once so far. But it was trailered both days that weekend. I can't speak for what the previous over did.

[MarkB05-200]

The backing coming off the carpet is very common. Some of us have used rubber roofing compound to help stop that.

Really?! What type of rubber compound are you talking about? Do you happen to have a brand name or model? The carpet itself is in good shape, but I just don't want all that black backing flaking off everywhere in the white interior.

[Bleil05]

If you’re trailing then Stainless is the way to go once you know the correct size
I would try the 19 Solax to see how it runs preforms and handles

[akorcovelos]

Remember a 19p aluminum is not the same as a 19p stainless.

[Big Block Power]

The backing coming off the carpet is very common. Some of us have used rubber roofing compound to help stop that.

Really?! What type of rubber compound are you talking about? Do you happen to have a brand name or model? The carpet itself is in good shape, but I just don't want all that black backing flaking off everywhere in the white interior.

I would get on black. That's the only thing I would change.
I scraped all the loose stuff off and applied a couple coats and it worked out good. All else fails you put down sea dek

[MarkB05-200]

The backing coming off the carpet is very common. Some of us have used rubber roofing compound to help stop that.

Really?! What type of rubber compound are you talking about? Do you happen to have a brand name or model? The carpet itself is in good shape, but I just don't want all that black backing flaking off everywhere in the white interior.

I would get on black. That's the only thing I would change.
I scraped all the loose stuff off and applied a couple coats and it worked out good. All else fails you put down sea dek

Awesome! Thank you for the images and info. I wouldn't mind the white in hopes if it does cause any issues with the deck, it would be white on white crime.

[Big Block Power]

Really?! What type of rubber compound are you talking about? Do you happen to have a brand name or model? The carpet itself is in good shape, but I just don't want all that black backing flaking off everywhere in the white interior.

I would get on black. That's the only thing I would change.
I scraped all the loose stuff off and applied a couple coats and it worked out good. All else fails you put down sea dek

Awesome! Thank you for the images and info. I wouldn't mind the white in hopes if it does cause any issues with the deck, it would be white on white crime.

Correct this stuff I wouldn't worry too much about that. I used some black stuff that's advertised on TV it was very much a oil base product. Bad.

[MarkB05-200]

Try a 4 blade aluminum prop
15 or 17
4 blades usually work better on a heavy boat it will give you more lift than a 3 blade
I only used a high 5 once and had too much motor for the pitch we had so I can’t speak to your current prop other than it’s to big

I would not go with anything aluminum. You just lose too much efficiency with them.

BBP, I have an aluminum 4 blade Solas Rubex that is a 19 pitch. It was free and just laying around. If it is an RPM issue from the prop, the 19 pitch should be a good start and possible indicator right?

Alright, finally able to give an update on the prop and RPM situation. I sold the High 5 on eBay for $300 and the Solas for $60 and put on a Turning Point 4 blade aluminum 15 pitch. I know you said it loses efficiency with the aluminum, but it was just a cheap solution to test out. The hole shot and planing time was a huge difference. It was even able to pull me up on skis. It wouldn't have been able to with the High 5. However, my RPM's are still only hitting 4,100ish.

So new questions arise. Would the exact same prop in stainless change any RPM's since it wouldn't flex/give like the aluminum? Or should I still look at going to like a 13p or 14p?

I am going to do a compression test as well just to eliminate that.

[Big Block Power]

Sounds like your tach isn't accurate to me. Ss you can go down more and get more performance. Each brand of prop though will act differently. Every pitch is about 200rpms.

[MarkB05-200]

Sounds like your tach isn't accurate to me. Ss you can go down more and get more performance. Each brand of prop though will act differently. Every pitch is about 200rpms.

What are your suggestions to pin point the issue? I can check connections on the electronics. Now that you mention it, I did notice the RPM's around 5,100 at some point when seconds earlier was 4,100ish. Then a ever so slight bump of the trim switch it went from 5,100 back down to 4,100. So I'm wondering if I have some sort of connection issue/short?!

[Big Block Power]

Sounds like your tach isn't accurate to me. Ss you can go down more and get more performance. Each brand of prop though will act differently. Every pitch is about 200rpms.

What are your suggestions to pin point the issue? I can check connections on the electronics. Now that you mention it, I did notice the RPM's around 5,100 at some point when seconds earlier was 4,100ish. Then a ever so slight bump of the trim switch it went from 5,100 back down to 4,100. So I'm wondering if I have some sort of connection issue/short?!

Yes check your connections at your guages and coil. You could get a timing light that has a tech on it. You really need to know What rpms you are really running. A 17p rev 4 would prob be the bomb on that boat.