Deck boat prop replacement

[Shubobo72315]

I have a 22' fisher deck boat 4.3 mercruiser. It currently has a 13.75 21 pitch 3 blade alluminum prop on it that is pretty beat up. Two of the blades have a couple chunks out of it and all are somewhat wavy. It has a decent hole shot but max rpm at wot are 4200 trimmed with a load of people. Pretty close to the same with just me and my wife. What size recommendations would y'all have for a as prop. I don't know if I am losing rpms from having a damaged prop or I need to go down in pitch.

 

[jestor68]

Re: Deck boat prop replacement

The full throttle operating range of your motor is 4400-4800 rpm. A 2 inch reduction in pitch(to a 19) will gain you 300-400 rpm; putting you up around 4500-4600.

That and the fact that the prop is new(not dinged up) will net you an improvement in performance you will appreciate.

The Solas Rubex 14-1/2 X 19 pitch might be a good choice. The only better choice for your boat would be the Quicksilver 15-1/2 X 18 pitch. It will turn almost the same rpm as the smaller diameter prop, but give you better load carrying ability.

 

[jestor68]

Re: Deck boat prop replacement

6

What'd they New Jersey Escorts nail you on?" Uncle Ives wishes to know, "strictly New Jersey Asian Escort pro?fessional interest, of New Jersey Escort course." Green Brief-bag over one New Jersey Asian Escorts shoulder, but lately return'd from a Coffee-House Meeting, he is bound later this evening for a slightly more formal version of the same thing,— feeling, here with the

Who let this guy in here? :facepalm:

 

[steelespike]

Re: Deck boat prop replacement

It would be good to know your actual light load wot rpm and speed by gps.
A "Load of people" doesn't tell much.Rpm without speed also doesn't help much..
If you do run loaded a lot a 19" might be in order.
No doubt it will be peppier not sure about top speed.

 

[Shubobo72315]

Re: Deck boat prop replacement

With just me in the boat on a glass lake I have been able to get the boat to pump 4400 rpms with gps speed of 37mph. With about 600 lbs in the boat at wot it will hit 4150 -4200 rpms and 35 mph and didn't really drop off much more than that when I had a load of eight people in the boat. Would my boat benefit from one of the high five props?