Alpha 1 Gen ll......New Gears or Prop?

[mrmelrod]

I just purchased a Sea Ray Sundeck from Texas (about 1000 msl) and am planning to use it in Arizona (approx 3000 msl.......it powerplant is an Mercruiser 5.0 efi w/alpha 1 gen ll with a stainless 19 pitch prop. Anyone have experience with this? Is there need for a new prop or will I have to swap gears to use the 19? Would I just be better off with a 17 prop? it currently has 1.62r gears.....any thoughts would be appreciated! Thanks!

 

[nikon]

Re: Alpha 1 Gen ll......New Gears or Prop?

Have you tried it out yet? What rpm are achieving?

 

[mrmelrod]

Re: Alpha 1 Gen ll......New Gears or Prop?

Unfortunately I have not been able to check the performance in the water due to cold temps........I was just trying to get an idea of what I might be up against.......thanx!

 

[dockwrecker]

Re: Alpha 1 Gen ll......New Gears or Prop?

A 5.0 with 1:62's should have no trouble with a 19. I run a 5.7 with 1:62's and a 19 on a much heavier boat at approx 6500 ft wih no issues.

 

[PROPer]

Re: Alpha 1 Gen ll......New Gears or Prop?

Just as dockwrecker mentioned you should be ok with your current gears. If you are not reaching your desired RPM it would be best to drop in pitch on your prop. Plus you will have a nice spare 19P if you ever tow the boat to a lower altitude or ding your new prop.

 

[mrmelrod]

Re: Alpha 1 Gen ll......New Gears or Prop?

Thanks for the help.....I'm trying to cover all the bases I can before summer!