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Author Topic:   E-TEC 30-HP
captain paul posted 09-19-2014 04:50 PM ET (US)   Profile for captain paul   Send Email to captain paul  
I [plan] to replace a damaged aluminum 10.3 x 12 propeller with a new stainless same pitch and diameter for an E-TEC 30-HP. Recommendations?
macfam posted 09-19-2014 10:09 PM ET (US)     Profile for macfam  Send Email to macfam     
Part no. 765178 10x13 BRP SST prop
On our 13 Super Sport with a 30 E-TEC, turning 5800 rpm at about 30mph
This is available from for about $190.00 (List $265)
Engine can be raised all the way up. Great grip, no blowout in hard turns.
Might consider 10x12 aluminum OEM for pulling tubes, etc.
captain paul posted 09-20-2014 10:42 AM ET (US)     Profile for captain paul  Send Email to captain paul     
Awesome, however I am getting about 5500-5600 on a dinged aluminum propeller. I am concerned that the 13-pitch would further reduce engine RPM. Also, I suspect going to a cupped propeller may make a difference in RPM. So, although I think I probably want to match my current 12-pitch, there seems to be a lot of variables at play. These things are too expensive to guess wrong. Will anyone let you swap out for a different pitch?
macfam posted 09-20-2014 05:07 PM ET (US)     Profile for macfam  Send Email to macfam     
What boat is your 30 E-TEC on?
Is it mounted with anti-vent plate ABOVE the level of the keel?
If you still want the 10 x 12", it is listed on the prop website. Same price.

At least on our 13 Whaler Super Sport, the 10 x 13 is a great match.
Don't know about exchanges.

captain paul posted 09-20-2014 09:40 PM ET (US)     Profile for captain paul  Send Email to captain paul     
I have two Whalers and so have always wanted an E-TEC due to this forum. I bought a new dingy partly because of the E-TEC 30. It is a Rigid Boats 12 Sport. I hate to ask a question about it here, but I trust those here regarding E-TEC enignes more than anywhere else. I saw tremendous results on my Montauk when I took the advice from those here in adding a jackplate, raising the engine and changing to a stainless propeller. So thought I would raise the engine and add a stainless propeller here too. The manufacturer says they place the engine at the lowest setting because they have seen cavitation on turning and don't want to field those calls from customers. I suspect and hope a better propeller will get a better bite as is your experience. Seems there is not a big selection for these little engines. There is also a Solas prop at Dan's Discount propellers a little cheaper, but I don't know how it might be different. Think I might go with the 10 x 12 BRP SST just due to the feedback here. Does anyone think there would be much difference on a little engine like this?
jimh posted 09-20-2014 10:30 PM ET (US)     Profile for jimh  Send Email to jimh     
Evinrude has a propeller program for dealers that lets them get a wide assortment of propellers for testing for customers, and I suspect the dealers get a bit of an extra discount on the test propeller--I don't know that for a fact. The Evinrude test propellers are always painted a rather bright yellow, so there is no mistaking them for the usual retail version of the propeller, which for a stainless steel propeller would be a bright and polished finish.

My local Evinrude dealer participates in the propeller testing program and he has a very wide selection of propellers available for testing. Also, if you buy an engine from him, he typically water tests the boat with the new E-TEC and tries many propellers to find the optimum choice.

Yes, testing propellers can be quite a matter of trial and error. Even propellers that people with a great deal of experience recommend might not work out on a particular boat and engine combination. You really have to test them on the water to be sure. For that reason, it seems best to work with a local dealer. Even if a mail-order dealer provided a return for credit, the shipping charges could quickly mount up. Due to the size and weight of a stainless steel propeller, they cost about $30 (or more) to ship.

jimh posted 09-20-2014 10:32 PM ET (US)     Profile for jimh  Send Email to jimh     
The general wisdom about stainless steel propellers working better than aluminum is often most true in higher horsepower applications. I don't know if at 30-HP the propeller material being stainless steel will result in a big difference from a similar propeller made in aluminum. The stainless steel propellers are much more durable, and they will survive a lot of incidental contact with the lake bottom or the garage wall or the pavement of a badly sloping driveway without being damaged, while an aluminum propeller in those situations will be wrecked.
captain paul posted 09-21-2014 03:38 PM ET (US)     Profile for captain paul  Send Email to captain paul     
First, thanks for allowing me to ask and to answer my question. I suspect Jim, that you are correct. I hear aluminum props have come a long way and probably won't make much difference on this small engine. However, I think I will get the SST anyway because I don't want to just keep thinking the little engine could do better with thinner better designed blades specifically because of the low horsepower.

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