16 Classic Prop Questions [Archive]

Oconee Bob

11-22-2009, 10:57 AM

I recently purchased a 1995 16 Classic, 1.84:1 reduction. The prop is marked: HD Quicksilver 48 16320 A423P. Prop seems to be in great shape but it allows the motor to rev very high (5500 RPM). I would like to limit the RPMs to the recommended 4400-4800 RPM. I physically measured the Diameter of the prop (13.5"). From the numbers stamped on the prop I THINK it is a 23 pitch. I would appreciate any and all advice and comments. Thanks in advance.

Cuda

11-22-2009, 11:50 AM

I recently purchased a 1995 16 Classic, 1.84:1 reduction. The prop is marked: HD Quicksilver 48 16320 A423P. Prop seems to be in great shape but it allows the motor to rev very high (5500 RPM). I would like to limit the RPMs to the recommended 4400-4800 RPM. I physically measured the Diameter of the prop (13.5"). From the numbers stamped on the prop I THINK it is a 23 pitch. I would appreciate any and all advice and comments. Thanks in advance.
It's defintely a 23 inch pitch. What engine do you have?

Oconee Bob

11-22-2009, 02:37 PM

Mercruiser 4.3 LX
Alpha One
180 HP

Cuda

11-22-2009, 02:57 PM

Is it a solid hub, or rubber hub prop? That sounds too high like the prop is slipping.

Oconee Bob

11-22-2009, 03:18 PM

Solid Hub
I pulled the prop off yesterday just to see if there was any obvious problems.......nothing looked weird. No matter where you trim the boat it will still over-rev. My guess is that the 1.84 gear has domething to do with it but not sure. I appreciate the help!

MOP

11-22-2009, 03:23 PM

Lets hope it is not a solid hub, should never put one on a clutch dog drive shortens the lower unit life quite a bit! 1:84 with a 23 sounds right, I would verify that your tach is right and the the hub in the prop has not started to slip.

Cuda

11-22-2009, 04:03 PM

I'm pretty sure a 1.84 is correct for a 4.3. I still don't think it should rev that high. Check to be sure the tach is set for a V 6.

Oconee Bob

11-22-2009, 07:13 PM

Thanks! I'll check the tach and make sure of the hub (solid or rubber). If it is solid should I change to another prop of just change hub? Is there a prop that is much better suited to the 16?

BUIZILLA

11-22-2009, 07:36 PM

13.5" diameter is for an outboard.....

you need a 14.25-14.5 diameter outdrive prop

MOP

11-22-2009, 08:07 PM

13.5" diameter is for an outboard.....

you need a 14.25-14.5 diameter outdrive prop

Ding Ding! Thought it was a tad small!

BigGrizzly

11-23-2009, 10:02 AM

That prop is a bottom line merc prop. go with a name prop like a M+ or turbo one or a Solas eith the same pitch.

Oconee Bob

11-24-2009, 07:38 AM

That prop is a bottom line merc prop. go with a name prop like a M+ or turbo one or a Solas eith the same pitch.
What about the diameter? Bigger, smaller, the same?

MOP

11-24-2009, 08:10 AM

Look at the third one down in this list, that is the right size for an I/O.

http://www.turbo-props.com/3blades/turbo/T1S/?prodID=14740

BigGrizzly

11-24-2009, 09:24 AM

Bigger diameter for that application.

Oconee Bob

11-25-2009, 04:18 PM

Thanks for your help! Ordering a 14-1/4" X 23" Turbo 1.

Happy Thanksgiving!!!

RPD

11-25-2009, 05:37 PM

be sure to have a local prop shop true and balance it ....

mike o

11-25-2009, 05:57 PM

FYI...My 1995 4.3 lx vortec with 4 barrel (205 hp) had the same prop on it, when I bought it second hand. It worked great taking the kids skiing....

BUIZILLA

11-25-2009, 06:40 PM

be sure to have a local prop shop true and balance it .... that's a waste of time and money...

RPD

11-27-2009, 02:03 PM

Maybe ... but I've had brand new props that improved with a just little work .... considering the cost of a new prop, an extra day and a few $$ isn't a big deal ...