Prop ideas

[boatsnhoes]

Hello all,

I’m looking for a new prop. My boat is 1993 Lavey Craft Sebring 20.8 tunnel hull with a 1993 Mercury 200 black max. The prop is an embarrassing 5 blade 23p that doesn’t pickup very well and doesn’t do anything positive for the boat’s performance. I’m currently spinning about 6500rpms at 55-58mph, it was in the mid 60’s but had engine rebuilt and lowered engine (probably will raise it back up). I get LOTS of prop spin at almost all rpm ranges really and porpoising too.

What I’m looking for:

- Better dock manners
- Decent hull shot, but looking for more top end
- Achieve 60mph+ at lower rpms
- Better bow lift (I know hard on these boats)
- Better prop pickup at lower rpm’s range

I’d like to stay with a Mercury prop because I can’t break the budget with $800 max to spend on one, but IF something else is recommended that is in the range and has real world experience with similar setup I am all ears.

As always thanks for the help RDP rocks!

 

[Markus]

Borrow some propellers from friends and see what works.

The most bow lift I have ever experienced was with a Mazco RE-4.

That said, while I know nothing about Lavey, tunnel hulls usually don’t need much bow lift from the propeller. The tunnel compression takes care of the lift.

 

[HST4ME]

24 trophy for day to day and a 26 hoss or mazco for the fun prop.

 

[boatsnhoes]

Borrow some propellers from friends and see what works.

The most bow lift I have ever experienced was with a Mazco RE-4.

That said, while I know nothing about Lavey, tunnel hulls usually don’t need much bow lift from the propeller. The tunnel compression takes care of the lift.

From what I’ve read from others with this hull it is more difficult to get bow lift than say a stoker or baker. But definitely looking at this Mazco RE-4.

 

[boatsnhoes]

24 trophy for day to day and a 26 hoss or mazco for the fun prop.

It sounds like 4 blade is your recommended prop?

 

[Flying_Lavey]

I'd give Ron and Chad Hill a call. Ron has a LOT of experience with outboard performance and a lot with this hull. His props are usually priced pretty well comparatively as well.

 

[Crazyhippy]

I'll second the trophy recommendation. I have always had good luck with them, on several different hulls

Hill is another awesome suggestion. Good dudes there!

 

[Markus]

It sounds like 4 blade is your recommended prop?

4-blades are smoother than 3-blades, and the performance penalty for bow lifting props is minimal.

For smaller hulls, you will not find many performance 5-blades.

 

[Superman13]

I have a 1996 20.8 with a 225 Promax, with hydro. jack plate 6" set back. I run a 25p 4 blade Trophy when its 3 or less persons in the boat. It will usually run 60-65 (5800- 6000 rpm) depending on load. Four or more persons I run a 23p 4 blade. The boat rides very nose heavy. It's a wet ride when it gets rough out.

 

[stoker2001]

From what I’ve read from others with this hull it is more difficult to get bow lift than say a stoker or baker. But definitely looking at this Mazco RE-4.

SO true of the 20.8 sebrings i have seen and drove...seems like they have knarley hook in bottom or the CG is way to much fore?

 

[HST4ME]

Last one of those I worked on ended up with a 12 inch setback and a re 4. Then it finally flew the bow properly.