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Trying to find a mariner prop

O

oldcrab

New member
any help is appreciated and if

any help is appreciated and if you can tell me proper names of parts

on outside of prop are #`s

4877346445 19p
4494 stamped cast just like this

inside #`s are
4877346 C1 19

on large brass washer type thing #`s are
12-8355467-1

on brass spline 15 splines #`s are
826074 B 12
 
"Gary, let's see what we c

"Gary, let's see what we can do for you here.

The prop I believe should read 48-77346A45 19P which is an OEM Quicksilver "Black Max" prop.

The other parts you are listing are components of the hub which will be a "flo-torq" II model.

As a complete "kit" it's Merc number is (now) 835257K 1.

This kit includes (current part numbers - some may differ from your original numbers, but parts are the same):

12-835467 1 Forward thrust washer
835290A1 Plastic drive sleeve
826074Q1 Aft adaptor
14-816629 Tab washer
11-827614 Prop nut

There is however a number of aftermarket, and other OEM props available for your set-up - depending on what it is that you are looking for."
 
"Gary, that's the idea beh

"Gary, that's the idea behind these props - replacable hub that is supposed to "break clean" if you do hit something, saving your prop.

I run a similar set-up from Solas props - picked up a spare hub kit and keep it in my "boat box" along with spare plugs, prop wrench, tool kit etc - don't leave home without it
"
 
"Gary, in general, going from

"Gary, in general, going from a 19 pitch up to a 21 would "decrease" your max rpm's by about 400 - so conversely, going down to a 17 would increase them by 400.

You should shoot for your engines Optimum WOT number, which is usually about 200 rpms below your maximum Wide Open Throttle (although some builders give you the exact number).

So for example, if your max range was 5000-5600 rpms, and the 19 pitch was only allowing you to get to 5000 (ok, but right at the low end of the range), a switch to a 17 pitch should get the rpm's up to 5400 (2" x 200 rpms) - perfectly to your Optimal number....

Other prop factors will also have an effect - a cupped prop will further decrease rpm's by about 50, and a 4 blade will run about 100 rpms less compared to a (standard) 3 blade prop.

Prop'ing your boat is about getting the engine running where it was designed to - speed and handling are simply "by-products" - this means the "fastest" prop set-up, may actually damage your engine...."
 
Corrected my above post incase

Corrected my above post incase you got the first copy. I had only stated a 200 rpm change for 2" of pitch change - it would in fact change about 200 rpm per 1" of pitch change...
 
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