The V 20 hits 50mph tops, but any faster ?

[THEFERMANATOR]

I'm spinning a 17 pitch APOLLO large diameter which is the generic equivelant of the MIRAGE. It's a pretty good prop that has virtually NO slip to it. I get close to 2-6% prop slip when running it hard which is a pretty solid bite. Also a MIRAGE style blade will take about 2" less pitch than a smaller diamter will. I've hit 53 with mine turning in the 5800 range on my HYDRA with a REALLY light load, but 48-50 is pretty achieveable on a regular basis.

[spareparts]

for a three blade, they are really efficeint, they give a bit better top end than a four blade with allmost the same cruise, hard to beat a four blade for midrange.

[RidgeRunner]

Great info. I definitely need to step up in pitch. It is on the limiter at 6100 rpm. I like the Marage on my Whaler it is highly polished. Do all Mirage propellers have the big diameter? Does polishing help or change anything?

[THEFERMANATOR]

The MIRAGE is a large diameter prop. There are 2 different styles of them though, the new ones with the XHS and the old ones without. The blades were changed some as well with the hub change. When you step up in diamter it will act like you went up in pitch. I went from a 15 pitch 14 5/8 diameter prop that woulkd turn up to around 6400 with a load in the boat to the 17 pitch 15 1/2" diamter that will barely hit 5400 fully loaded(5600-5800 light load). The mirage stylke blade is very efficient so it acts like an inch or 2 of itch just by going to it. I would try a 19 MIRAGE and see what it does, also you need to get somebody to help you check your engine height while running.

[RidgeRunner]

Got it. I know it to be risky by myself but the motor height was the first thing I checked. The lighter 200 was perfect mounted in the top hole the cav plate was right on top at 40 mph. The 250 seems to be a little low, I can barely see the top of the plate while underway and I mounted it using the second hole. It has a tiny bit of spray coming off the lower on one side only. 3/4" higher should do it. The bracket was mounted per the directions.
The Mirage 19 will be my next prop to test.
BTW I have been posting for a album. I need to reach 100 posts. LOL
At this rate my album will be here next week.

[RidgeRunner]

Nothing to report. Bronchitis slowing me down. Hope the boat is immune. I've looked into actual hp numbers on the 250 EFI and I think with a little more setup it might reach 58mph.
I have been second guessing the decision for more speed. I think this old girl deserves better treatment than what she is getting right now. You know, run hard and put away wet. I am a gearhead but I don't really have the speed bug. Besides fat people get distorted over 55mph...

[Genie Aye]

Just a question--Is not the 250 over the rating for the boat>>

Mine has a rating of a 235hp.

Just curious if these boats varied on the HP ratings for different years.