FINALLY got my 237 - now what prop do I need?

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FINALLY got my 237 - now what prop do I need?

Postby zcd2.7t » Thu Aug 09, 2012 9:49 am

zcd2.7t wrote:
River Rat wrote:OK Folks - here's an update....So, a couple weeks ago I purchased a 18 pitch Enertia and finally had a "normal" boat load of people (like when testing the other props) last weekend to try it out. This prop is amazing!!

Hole shot was greatly improved and had virtually no bow rise - hammer down and go. Mid range was about the same as with the Vengeance (RPM vs speed). Acceleration was outstanding and brought a smile to my face every time I did it. WOT was actually very good too. I gained my 200 RPM's, which put me back at 5,000 and top speed was the same as with the Vengeance. Everything was checked using GPS but do expect that my WOT speed will decrease 1 MPH or so as the current was moving a little faster than normal.

So - 18 pitch is the one. RR


OK, so reviving an ANCIENT thread here, but with good reason (IMO). Does anyone have any other prop suggestions for a 237LS? Holeshot and mid range performance are most important to me, though not at the expense of TOO much top end performance..

Thanks!


I just (finally) bought a 237 LS, from another member on this site, actually. It's equipped with the Volvo Penta 5.7Gxi 320hp stern drive with 21" pitch prop. I have no experience with Volvo Pentas, and don't know if I should be considering changing props, or what. I don't even know if Mercury Marine props like the Enertia fit Volvo Penta stern drives?

The boat will mainly be used for towing and cruising with several passengers on board.

Does anyone have any thoughts about whether I should be looking at a different prop, or what will actually fit the boat? TIA.
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Postby AndrewT » Thu Aug 09, 2012 6:43 pm

A four bladed 19" pitch will be a good choice for you, you'll loose a bit of top end but it will get on a plane quicker and it will pull like a tractor :D You can use Mercruiser props with a hub adapter kit.
2005 Interceptor 212
Volvo 5.0 GXi 270hp
21P 14.5 3B SS prop and 19P 4B SS for wakeboarding and tubing.
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Postby basshawk84 » Sun Aug 12, 2012 10:00 am

I've got the 5.0 GXi on my 212, get 5000 rpm with a 19" Mercury Revolution 4. Gets on plane fast, pulls toys great and works well with a bunch of people in the boat. I also have a 21" Enertia. The top end on it is about 8 mph faster than the rev 4 according to the speedo. I run the REv 4 95% of the time in the summer.
2004 212 Interceptor, Volvo 5.0 GXi, 21" Enertia & 19" Rev 4
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Postby AndrewT » Sun Aug 12, 2012 11:48 am

basshawk84 wrote:I've got the 5.0 GXi on my 212, get 5000 rpm with a 19" Mercury Revolution 4. Gets on plane fast, pulls toys great and works well with a bunch of people in the boat. I also have a 21" Enertia. The top end on it is about 8 mph faster than the rev 4 according to the speedo. I run the REv 4 95% of the time in the summer.

What speeds are you getting by the GPS?
2005 Interceptor 212
Volvo 5.0 GXi 270hp
21P 14.5 3B SS prop and 19P 4B SS for wakeboarding and tubing.
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Postby zcd2.7t » Tue Aug 14, 2012 1:24 pm

AndrewT wrote:A four bladed 19" pitch will be a good choice for you, you'll loose a bit of top end but it will get on a plane quicker and it will pull like a tractor :D You can use Mercruiser props with a hub adapter kit.


I appreciate your thoughts.

The boat accelerates well with this prop - better than I expected, actually, and seems to stay on plane all the way down to about 16 mph, which is awesome.

GPS top speed is 54-ish mph @ 4800 rpm with 2 people on board and 1/4 tank of fuel. Prop has a few nicks in each blade, so that might be costing me a bit at the top end, but overall this seems like a good all around prop for the boat.

I could go down to an 18" pitch Enertia, which another member suggested seemed like a great prop for the boat:

http://caravelleboat.com/forum/posting.php?mode=quote&p=34244

...but I have to think I'd lose a bunch on the top end....?
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Postby basshawk84 » Wed Aug 15, 2012 4:37 pm

No GPS, just the Speedo. 50-52 mph with the REv 4 and 57-58 MPH with the Enertia.
2004 212 Interceptor, Volvo 5.0 GXi, 21" Enertia & 19" Rev 4
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Postby Larry R » Thu Aug 16, 2012 12:14 pm

I've got the same engine/out drive combo as you - smaller boat (232) I went to the 4 blade stainless and have never regretted it!

Performs very well at low speed – lost some top end, but that didn’t bother me since I rarely operate at WOT.

Larry R
2003 232 "Interceptor" Bow Rider - 5.7 320hp
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Postby Bezdonr57 » Thu Aug 16, 2012 1:17 pm

If you switch to the Enertia, I suggest you go up an inch in pitch instead of down. The Enertia is a smaller diameter and this will increase your RPM a little at a given pitch so going up a little in pitch is usually recommended. I have even found this the case using the Merc prop calculator on their site. Their calculator recommended I go from 21P to 22P in the Enertia.
2003 Interceptor 212SS Merc 5.0 MPI
2000 Durango 5.9 Magnum 4x4
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Re: FINALLY got my 237 - now what prop do I need?

Postby zcd2.7t » Mon Jul 28, 2014 1:30 pm

Reviving this ole thread one more time:

Long story short, sent the 14 3/4" x 21" Volvo Penta prop that was on the boat when I bought it in for some cleanup of the nicked edges, etc. When it came back, the boat REALLY struggled on acceleration and would only hit about 4600 rpm at WOT. Recommended range is 4800-5200 rpm on this motor. Sent the prop back for MORE work, and it's better, but still barely pulls 4800 rpm and hits just over 52 mph, but acceleration still isn't where it should be.

Soooooo, I gave up and bought a 14 3/4" x 19" prop that's going on this weekend. Hoping for better hole shot and 5000-ish rpm. We'll see...
2006 237LS, 5.7GXi, 2009 Yamaha FZ-S
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Re: FINALLY got my 237 - now what prop do I need?

Postby HOT PURSUIT » Mon Jul 28, 2014 11:30 pm

Go ENERTIA!!!!!!! Ask GETTIN BUZZED :D

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Re: FINALLY got my 237 - now what prop do I need?

Postby zcd2.7t » Tue Aug 12, 2014 9:31 am

Okay, so results are in - I guess about what I expected.

Previous top speed (14.75" x 21" OEM Volvo-Penta SS prop) was 54 mph (GPS) @ 4800 rpm with fair-to-middling acceleration.

New top speed (14.75" x 19" OEM Volvo-Penta SS prop) is 52.5 mph @ 4850 rpm with pretty decent acceleration. (pulled me up on a slalom ski with no problems even with 8 people in the boat). Also seems to hold plane easier and has a bit less bow-rise (unscientific observation).

So, was it worth the investment? Overall I'd say yes. The new prop is a better all-around compromise for a bow-rider.
2006 237LS, 5.7GXi, 2009 Yamaha FZ-S
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Re: FINALLY got my 237 - now what prop do I need?

Postby HOT PURSUIT » Tue Aug 12, 2014 10:25 am

Glad it worked out :mrgreen:

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Re: FINALLY got my 237 - now what prop do I need?

Postby AndrewT » Wed Aug 13, 2014 12:10 am

Good result, did you get 4 or 3 bladed prop?
2005 Interceptor 212
Volvo 5.0 GXi 270hp
21P 14.5 3B SS prop and 19P 4B SS for wakeboarding and tubing.
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Re: FINALLY got my 237 - now what prop do I need?

Postby zcd2.7t » Wed Aug 13, 2014 10:44 am

AndrewT wrote:Good result, did you get 4 or 3 bladed prop?


Volvo-Penta OEM 3-blade, part number 3860708
2006 237LS, 5.7GXi, 2009 Yamaha FZ-S
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