ETec 30

[island drive]

Putting her on a Starcraft SF 14....14'2'' boat. Wt 185 lbs, motor wt 150lbs. recommendations for prop pitch....boat and motor on order but the prop is a Major concern because I have to drive 160 r/t to change out, they are telling me an 11 pitch to start.

 

[steelespike]

Re: ETec 30

Check out the Evinruide etec site. I think you will be running a 13" prop
Two similar boats but much heavier. a Starcraft pro craft 1620 570 lbs one man gas,30- hp motor 10-3 X 12 prop 5800 rpm @ 27.6
Starcraft 1620 280 lbs 2 men gas,battery 25 hp motor 10.3 X 12' 6000 rpm @ 31.6.
I think they were running an 11" prop on a 1100 lb Sea Ark. 25hp at about 19 mph. 5385 rpm.
You could check out you tube for on the water tests as well.You will be really stepping out.
By the way a SF 16 will probably handle weight better and run faster with it.

 

[jestor68]

Re: ETec 30

If I put a Mercury 30 on that boat and put the numbers thru the Mercury prop selector; it tells me that with a 14" pitch prop (weight of 699 lbs) it will do 34.7 mph at 5750 rpm with basically one person in the boat.

So it seems plausible that a 13" prop should get another 200 or so rpm.....up to about 5950 rpm.

If operating by your self, you could go all the way up to a 15 pitch and really tear a** around.

But prop selection is about how much weight will be in the boat. Put another person(or two) in there and you could be down to a 12 or 11 pitch in order to haul the extra weight.

You may need a Doel Fin on that motor to keep from porpoising.

 

[kfa4303]

Re: ETec 30

I will have to respectfully disagree on the dole fin. They're the ultimate in boating gimmickry/snake oil. Kinda like the coffee can exhausts and go-fast wings guys bolt on to their import cars in an attempt to gain a few mph. Not only do they not work, they make you look ridiculous. A properly mounted and trimmed motor, especially one as nice as an e-tec 30, will not a dole fin and should come with hydraulic trim/tilt, I believe. By installing one, you not only destroy/devalue the motor by drilling holes into it, but the stress they can create on the anti-vent plate, could cause it to break. The best way to eliminate porpoising and bring the bow down, is to redistribute the weight, trim the motor IN to the transom and/or use remotely adjustable trim tabs. LENCO are probably the best in the business. It mostly just takes lots of trial and error to find the best set up for your purposes, but dole fins and not the answer. There's a reason you never see professional guides, or anglers using them. Keep us posted on the e-etch. I hear great things about them. No break in period, lots of low end torque, good reliability and much lighter than their 4-stroke cousins.

 

[jestor68]

Re: ETec 30

I will have to respectfully disagree on the dole fin. They're the ultimate in boating gimmickry/snake oil. Kinda like the coffee can exhausts and go-fast wings guys bolt on to their import cars in an attempt to gain a few mph. Not only do they not work, they make you look ridiculous. A properly mounted and trimmed motor, especially one as nice as an e-tec 30, will not a dole fin and should come with hydraulic trim/tilt, I believe. By installing one, you not only destroy/devalue the motor by drilling holes into it, but the stress they can create on the anti-vent plate, could cause it to break. The best way to eliminate porpoising and bring the bow down, is to redistribute the weight, trim the motor IN to the transom and/or use remotely adjustable trim tabs. LENCO are probably the best in the business. It mostly just takes lots of trial and error to find the best set up for your purposes, but dole fins and not the answer. There's a reason you never see professional guides, or anglers using them. Keep us posted on the e-etch. I hear great things about them. No break in period, lots of low end torque, good reliability and much lighter than their 4-stroke cousins.

It never fails. Mention the dreaded Doel Fin and it brings out the haters. The thousands of folks ( me included)that use it enjoy quick planing and stable rides with no porpoising. FYI, mine has been on there for these 15 years with no ill effects. But I suppose something awful will happen any day now.

Trims tabs on a 14 foot tinny. Give me a break. :facepalm:

 

[Mi duckdown]

Re: ETec 30

30 hp on a 14' alum? tiller?

 

[pootnic]

Re: ETec 30

http://www.google.ca/url?sa=t&rct=j..._YCABg&usg=AFQjCNHNRyaeVUryTC7WZUPQ0LbPiBO9Vg
http://www.google.ca/url?sa=t&rct=j..._YCABg&usg=AFQjCNFun9o1y9yE-JPANyy2p_9iYVMuug
http://www.google.ca/url?sa=t&rct=j..._YCABg&usg=AFQjCNH7KyK6BPA0-oXg8AEB_4M4rMMILA

Theres also a few other threads there.
I'm thinking the 11 pitch is going to be alittle small,12-13 pitch more likely.

 

[Frank Acampora]

Re: ETec 30

I sort-of have to agree about the doel-Fin or hydro-foils in general: Over the years I have bought and sold many engines, both large and small, with and without them. While I don't use them myself, I have never seen an anti-ventilation plate broken because of use of a hydro-foil.

If you hit something hard enough to break the plate, It will break with or without the foil in place. AND: Four 1/4 inch holes in the anti-vent plate will not devalue the engine one bit.

 

[jestor68]

Re: ETec 30

30 hp on a 14' alum? tiller?

It is rated for 35 hp.

 

[mpsyamaha]

Re: ETec 30

i personally dont like using the fins on almost all boats, but sometimes on small boats with higher hp, they do help porpoising. pretty much anything over 15ft with some weight to it and power trim they are ridiculous.

 

[island drive]

Re: ETec 30

It is rated for 35 hp.

Your right, but having been raised on WI lake boats from the fifties thru the seventies I've learned that weight and boat equal less Speed and Fun, to me fast and water = more fun. The E tec is the lightest of all motors in its class, plus anything that is 35 hp is Three cylinders and is four stroke and is minimun 25lb heavier and more, and lifting and moving become a concern since I just became a grandpa . I also hate maintenance and the cost, 17 yrs running auto/truck/mthm repair shops tells me so. I appreciate all the insights and knowlege, thx.

 

[island drive]

Re: ETec 30

Check out the Evinruide etec site. I think you will be running a 13" prop
Two similar boats but much heavier. a Starcraft pro craft 1620 570 lbs one man gas,30- hp motor 10-3 X 12 prop 5800 rpm @ 27.6
Starcraft 1620 280 lbs 2 men gas,battery 25 hp motor 10.3 X 12' 6000 rpm @ 31.6.
I think they were running an 11" prop on a 1100 lb Sea Ark. 25hp at about 19 mph. 5385 rpm.
You could check out you tube for on the water tests as well.You will be really stepping out.
By the way a SF 16 will probably handle weight better and run faster with it.

Thx, I have ck'd out and seen the reports on the Evinrude site. Any 16' boat is too heavy for me to want and too long and more wt to tow with my 4 cyl car. If there was a 16 under 200 lbs I would of considered it, but I hate the combo of boat weight and motor weight effecting performance, I enjoy speed allot and I hope this boat will scream tho I'm definitely at altitude which takes about 20% of your power away, so prop pitch at altitude is waay different than at sea level.

 

[island drive]

Re: ETec 30

If I put a Mercury 30 on that boat and put the numbers thru the Mercury prop selector; it tells me that with a 14" pitch prop (weight of 699 lbs) it will do 34.7 mph at 5750 rpm with basically one person in the boat.

So it seems plausible that a 13" prop should get another 200 or so rpm.....up to about 5950 rpm.

If operating by your self, you could go all the way up to a 15 pitch and really tear a** around.

But prop selection is about how much weight will be in the boat. Put another person(or two) in there and you could be down to a 12 or 11 pitch in order to haul the extra weight.

You may need a Doel Fin on that motor to keep from porpoising.

Remember, I'm at altitude, so do you feel the same since we lose 20% performance up here on anything that burns gas.

 

[island drive]

Re: ETec 30

http://www.google.ca/url?sa=t&rct=j..._YCABg&usg=AFQjCNHNRyaeVUryTC7WZUPQ0LbPiBO9Vg
http://www.google.ca/url?sa=t&rct=j..._YCABg&usg=AFQjCNFun9o1y9yE-JPANyy2p_9iYVMuug
http://www.google.ca/url?sa=t&rct=j..._YCABg&usg=AFQjCNH7KyK6BPA0-oXg8AEB_4M4rMMILA

Theres also a few other threads there.
I'm thinking the 11 pitch is going to be alittle small,12-13 pitch more likely.

Being at altitude, 5,000 ft do you still feel the same? We lose 20% of HP up here on anything that burns gas. I was too thinking the 12-13 pitch, but the Denver dealer is thinking differently. As to mounting Anything to help planeing, I'm very reluctant, but the idea of wt distribution and motor tilt angle would be where I first tweak. I want to have the fastest rowboat in CO, thats just me.

 

[island drive]

Re: ETec 30

delete

 

[steelespike]

Re: ETec 30

Thx, I have ck'd out and seen the reports on the Evinrude site. Any 16' boat is too heavy for me to want and too long and more wt to tow with my 4 cyl car. If there was a 16 under 200 lbs I would of considered it, but I hate the combo of boat weight and motor weight effecting performance, I enjoy speed allot and I hope this boat will scream tho I'm definitely at altitude which takes about 20% of your power away, so prop pitch at altitude is waay different than at sea level.

If your going to be running light then the 14 should serve. But we had a 14ft aluminum utility that wouldn't plane 4 adults and light gear with a 25. Gale. We replaced the 14 with a 18ft utility that same Gale would plane easily with 6 adults.
Don't know about top speed but it appeared the same.It's been 35 years so hard to recall.
We still have the boat now with a 50 tiller. Also if your really into speed from my limited observations a glass boat can be a bit faster than a similar style aluminum even though heavier.I think it is the convolutions of some aluminums compared to a smooth glass bottom.
Things like rivets and multiple keels less subtle bends etc.
It does sound like your 14 might be bigger than some small 14s being rated for a 35.With that elevation you may have to start with an 11. But assuming the motor can turn a 12 or 13 it may be faster.
By the way the 25 on the 16ft Starcraft that does 31.6 @ 6000 is making a remarkable 3% slip.

 

[pootnic]

Re: ETec 30

Being at altitude, 5,000 ft do you still feel the same? We lose 20% of HP up here on anything that burns gas. I was too thinking the 12-13 pitch, but the Denver dealer is thinking differently. As to mounting Anything to help planeing, I'm very reluctant, but the idea of wt distribution and motor tilt angle would be where I first tweak. I want to have the fastest rowboat in CO, thats just me.

Sorry,didn't see where you are located.
In the second post,the guy(coastalguy) has a 16'SSV,a 30hp,11 pitch;he was getting 5800rpm around 26mph(Colorado @ 5300 ft).
At a 20% lose,your still at around 25hp,on a 14' aluminum boat.
Depending on how you want to use your rig and weight you have in it,the 11 pitch could be fine,it's diffinitly in the ballpark.Worse come to worse,your rpms might be alittle high,just don't go WOT(I imagine that type motor would have governor or safe mode).Next time you make a journey to the shop,buy another prop or get one shipped.
Without a tach,were all just giving you "educated"guesses.
ps...I have nothing to say about doil fins,have never had to try one and my guess is still a 12 pitch

 

[island drive]

Re: ETec 30

http://www.google.ca/url?sa=t&rct=j..._YCABg&usg=AFQjCNHNRyaeVUryTC7WZUPQ0LbPiBO9Vg
http://www.google.ca/url?sa=t&rct=j..._YCABg&usg=AFQjCNFun9o1y9yE-JPANyy2p_9iYVMuug
http://www.google.ca/url?sa=t&rct=j..._YCABg&usg=AFQjCNH7KyK6BPA0-oXg8AEB_4M4rMMILA

Theres also a few other threads there.
I'm thinking the 11 pitch is going to be alittle small,12-13 pitch more likely.

Thx for the links and I'm kinda thinkin' the same. Almost all boat motor combinations were 170 - 500lb heavier and more than my setup, ''ILIKELITE'' best describes my realtions ship with vehicles riding on the top of the water. I'll probably bring home a 12 & a 13, might wanna keep em both & its nice havin' a backup JIC....