Need advice on prop selection for Merc 898

A

aerocraft1

Recruit
Joined
Jun 18, 2012
Messages
2
I have an Aerocraft Monte Carlo I that my family has had for years. Has the Merc 898 with a 305cid. It hasn't had a decent prop since the first time it hit something. I need advice on diam and pitch for a 3 blade prop. We live in illinois, its has trouble planing with a full load. Prop calculators are all over the place. Not sure what to be looking for. Any help would be greatly appreciated.
 
QC

QC

Supreme Mariner
Joined
Mar 22, 2005
Messages
22,783
Re: Need advice on prop selection for Merc 898

Can you take a look at the stickies at the top of this section and give us as much info as you can? We'll do our best from there. Welcome aboard!!!! :)
 
S

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: Need advice on prop selection for Merc 898

Your prop size should be under the prop nut.
 
A

aerocraft1

Recruit
Joined
Jun 18, 2012
Messages
2
Re: Need advice on prop selection for Merc 898

Existing prop is a 15.5" 19p. The boat has trouble planing with a full load. The RPMs max out at about 4500.
 
7

79 delta runner

Recruit
Joined
Jun 19, 2012
Messages
5
Re: Need advice on prop selection for Merc 898

I have a 79 17' delta bowrider with same motor and out drive currently I'm running a 14.5 4 blade 16 pitch does great job planning quick and pulling tube or skier. But depending on what your after the top speed is a little low I max out around 37 to 40 at 4500 rpm if that helps any.
 
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