propellor pitch for 25 seafari i/o

[kenkurek]

Can anyone tell me if I would benefit from a 4 blade prop, I currently run a mirage 19p 454cu in mercruiser i/o WOT 4350 rpm @39kts. I am primarily concearned about mid range cruise (25kts) and fuel economy. Any help would be greatly appreciated.

[Dilligaf]

uh oh you better post some pics ..... another 25seafari? post pics b4 people start begging

[Ken Kurek]

here are some pic's [image]http://home.comcast.net/~kenkurek/site/?/photos/[/image]

[McGillicuddy]

You got a perty bote mister

[seafari25]

Perty bote in...deeeeeed

The last time I bought a prop for the Seafari I was too busy crying over how much I payed for it to pay attention to the pitch however I don't think I would be of much help anyway as I'm about 10 mph behind already

Possibly more info is required but hopefully Fr. Frank might chime in.

Brandon

P.S Ken, PM sent re: hatch

[Bigshrimpin]

http://home.comcast.net/~kenkurek/pwpimages/147.JPG

Don't show strick these pictures!! 454 sounds like a good match for the boat. What kind of economy are you getting with the mirage 19p at cruise?

[1bayouboy]

A Merc Rev 4 really improved a boat I have it's stern heavy and the Rev 4 has great stern lft as well as holding it on plane at lower speeds.

[Fr. Frank]

I like the Mirage, but some are getting better mid-range performance and economy wit 4 blades, but at the cost of a couple MPH in top end.
Rev 4, or 4B Trophy are worth a try. Better yet, contact the guys at PowerTech and ask about the OFS 4 blade.

[Water Rat]

Ken,
I have a '78 23' Sceptre with same power, a 7.4 liter (454ci), 330hp carb. engine and Bravo One drive. I'm also using a 19" Mirage Plus 3 blade. I'm curious to know what drive and ratio you have, as I seem to have roughly the same numbers as you, and wondering if a different wheel might be better.

[Ken Kurek]

Chris:

I am also running the same prop and outdrive. I am not sure of the ratio. I thought an 18p 4 blade would do nicely with the setup we have.