Need help on selecting a prop

[Moorefun]

Hello everyone. I have a 1975 searay srv 220 with a 302 motor. I am looking to buy a new prop for my boat but not sure of the size and pitch needed. The boat is mostly used for fishing and riding around. I do not have the owners manual to find anything out so any help on prop size and pitch would really be appreciated. Just want the best performance. Thanks!

 

[chasemixon]

What do you currently have on the boat?

 

[Ten Years Gone]

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[Breakwater]

The only way to really know is what your WOT RPM's are and what they are supposed to be. That's your starting point.

 

[Moorefun]

I am not sure of how to tell the pitch that is on there now. Also when I have been out I never thought to pay attention to my wot rpms. I took it out 2 days ago and there was a vibration at higher speeds. I do have a little play in the prop when I grab it and turn it left and right and pull on it. I can't tighten it down anymore either. I just hope a new prop will take care of the vibration and it isn't anything major. If a 4 blade will get the boat up faster then that is probably what I will get. Just have to figure out the pitch now. Someone also told me a 23 pitch will run my boat at 3500 wot rpms and 40 mph. Just not sure how accurate that is.

 

[Breakwater]

I am not sure of how to tell the pitch that is on there now. Also when I have been out I never thought to pay attention to my wot rpms. I took it out 2 days ago and there was a vibration at higher speeds. I do have a little play in the prop when I grab it and turn it left and right and pull on it. I can't tighten it down anymore either. I just hope a new prop will take care of the vibration and it isn't anything major. If a 4 blade will get the boat up faster then that is probably what I will get. Just have to figure out the pitch now. Someone also told me a 23 pitch will run my boat at 3500 wot rpms and 40 mph. Just not sure how accurate that is.

There will be numbers on the prop. for example: 23P. If you go to a 4 blade prop, drop down in pitch a number or 2 and install a new hub. Most come with a new hub. There should be no lateral play in a hub but a little in and out is fine.

 

[cmount1]

The information below is from Sea Ray.

YEAR	MODEL	ENGINE OPTION	PROP SIZE	WOT RPM
1976	220 OV	188 Merc	16 X 15 C	4200
1976	220 OV	233 Merc	14 X 19 C or sub a 15 - 3/4 X 17 C	4200
1976	220 HT	188 Merc	15 - 3/4 X 17 C	4200
1976	220 HT	233 Merc	14 X 19 C	4200

 

[Breakwater]

The information below is from Sea Ray.

YEAR	MODEL	ENGINE OPTION	PROP SIZE	WOT RPM
1976	220 OV	188 Merc	16 X 15 C	4200
1976	220 OV	233 Merc	14 X 19 C or sub a 15 - 3/4 X 17 C	4200
1976	220 HT	188 Merc	15 - 3/4 X 17 C	4200
1976	220 HT	233 Merc	14 X 19 C	4200

Good info. Now the OP just needs to let us know his WOT Rpm's

 

[Ten Years Gone]

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