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HP required to plane 12ft Higher BBSB.

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HP required to plane 12ft Higher BBSB.
I recently acquired a 12foot Higher BBSB. It doesn't plane with me(170lbs) plus 30-40 lbs of gear. Curious if others know whether stepping uup from a 6hp 2 stroke Johnson to a 8hp 2stroke Johnson will get it up on plane, or do I need to go to 9.9 or even 15hp? I plan to hunt 4miles from my launch ramp. Due to various reasons I prefer a lighter motor that I can put on and off easily. Any input greatly appreciated....
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Re: HP required to plane 12ft Higher BBSB. In reply to
Is it a displacement or planing hull?


Carl
Mobile, AL
DHBP Member since 1998

"Life is too short to drink bad beer."
Disclaimer: This post and/or report is not a substantiation of or reflection on the true accuracy of the present surveying methods. It is only a report on or comment concerning local observation and/or results. Your results and observation may vary based on your location, local water conditions, food supply, weather conditions and migratory patterns "
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Re: HP required to plane 12ft Higher BBSB. In reply to
Carl, thanks for your prompt response. I don't know if it is displacement or planing. That is why I am asking more experienced folks on this forum. The hull is very flat on bottom, not a deep Vee at all. The same 6hp (or even 4hp) planes me and gear in my lightweight SeaKing 12foot aluminum v-hull . BTW I misspelled "Higbee "... thanks again.
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Re: HP required to plane 12ft Higher BBSB. In reply to
If it has a banana shape to the bottom Like a true bb sneak box its not going to plane no mater what hp you put on it
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Re: HP required to plane 12ft Higher BBSB. In reply to
Do you have any friends with an 8, 9.9 or 15 hp motor you can borrow to see if it planes?
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Re: HP required to plane 12ft Higher BBSB. In reply to
Ok. It?s a Higbee. There are probably some guys here own know about them.
As noted, if it?s a displacement hull, it won?t plane so the 6hp is plenty. Search the posts here I bet there is a Higbee discussion on this topic


Carl
Mobile, AL
DHBP Member since 1998

"Life is too short to drink bad beer."
Disclaimer: This post and/or report is not a substantiation of or reflection on the true accuracy of the present surveying methods. It is only a report on or comment concerning local observation and/or results. Your results and observation may vary based on your location, local water conditions, food supply, weather conditions and migratory patterns "
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Re: HP required to plane 12ft Higher BBSB. In reply to
Unfortunately I don't have any friends that could loan me an 8/9.9/15hp. Ideally that is how I would proceed to "try before I buy". Hull shape is in attached photos. I have owned a variety of small craft up to 18ft deep Vee center console, but never anything with hull shape like this. Intuitively it seems this boat should be capable of skimming across the water surface like a waterbug. Maybe I am wrong and will have to be happy with the 9.4 best-measured MPH achieved with 6hp. If weather turns bad when I am 4 miles from ramp fighting an outgoing tide, I would rather have a 15minute ride back to safety vs. 30min or more. I have searched in this forum back to around page 18 and will keep searching further. Thanks again...
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Re: HP required to plane 12ft Higher BBSB. In reply to
Use the search function on the top bar:

http://www.duckboats.net/...gbee%20power#p140391

http://www.duckboats.net/...gbee%20power#p152522

http://www.duckboats.net/...gbee%20power#p316353

For a start.....

I would be looking for a 15hp myself. I have a 15hp on my BBSB, but it is a 5ft wide displacement hull. I have not tried less, maybe I am over powered. Fully loaded during duck season I get 10mph at 3/4 throttle. In summer trim, at WOT, I have touched 13+mph. Your hull will plane.

Dave Diefenderfer
Manassas, VA

"Once you set out to build a boat, throw away your square. And if you work on her after she's launched, throw away your level." author unknown

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Re: HP required to plane 12ft Higher BBSB. In reply to
That rig will run like a speed boat with a 15hp two stroke. That's what everyone runs on them out this way. Higbees are light weight planing hulls.
________
Coastal NJ
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Re: HP required to plane 12ft Higher BBSB. In reply to
Well there?s your answer!


Carl
Mobile, AL
DHBP Member since 1998

"Life is too short to drink bad beer."
Disclaimer: This post and/or report is not a substantiation of or reflection on the true accuracy of the present surveying methods. It is only a report on or comment concerning local observation and/or results. Your results and observation may vary based on your location, local water conditions, food supply, weather conditions and migratory patterns "
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Re: HP required to plane 12ft Higher BBSB. In reply to
Thanks all for the input. So I am concluding that, while at least one person has found they can get on plane with 8hp, majority opinion is that a 15hp is ideal. I did read somewhere else that in off-season some guys are racing these BBSB's. 'Guess I will shift my engine search to 15hp...
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Re: HP required to plane 12ft Higher BBSB. In reply to
You could probably get away with a 9.9, plenty of guys do, but once you start adding grass, decoys, gear, etc. you'd be better off with a 15.

I could easily get away with a 15 on my sneakbox, but when I have two dozen decoys, two guys and it's blowing a gale I'm glad I have a 25.
________
Coastal NJ
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Re: HP required to plane 12ft Higher BBSB. In reply to
Craig, good point on the 15 vs. 9.9, especially if the weight of the 2 engines is same/similar (which I understand to be the case for many OMC's). Thanks for the input.
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Re: HP required to plane 12ft Higher BBSB. In reply to
Craig, I forgot to ask, what length is your Sneakbox?
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Re: HP required to plane 12ft Higher BBSB. In reply to
12ft 6" for my two man boat.

I have a Bob Fricke glass over cedar one man sneakbox, that boat gets a 15 hp yamaha two stroke. Haven't used that boat in a few years however.
________
Coastal NJ
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Re: HP required to plane 12ft Higher BBSB. In reply to
That 12ft6in must be a quite seaworthy design to accommodate 2 guys. I have a 12ft v-hull aluminum that has too little freeboard for my taste with 2 guys (although my buddy weighs 230 lbs). This summer I am going to take a test ride in my Higbee with my son who weighs around 150 to see what it might be like. Although I intend to hunt solo in the Higbee.
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Re: HP required to plane 12ft Higher BBSB. In reply to
That higbee isn't designed for two guys, it's a one man boat. My two man boat isn't a traditional sneakbox whatsoever. It's a Delaware bay design...




________
Coastal NJ
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Re: HP required to plane 12ft Higher BBSB. In reply to
Nice pair of boats you can choose from depending on whether you want to hunt with a buddy or alone...
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Re: HP required to plane 12ft Higher BBSB. In reply to
Dave- I have a 12? Higbee sneak box circa mid 1980?s. The boat is a planing hull and would probably plane off with a 6 hp with 1 man and minimal gear. Once you start loading it the equation changes and in my opinion a 9.9 hp would be the minimum I would use. I run mine with a 15 hp 2 stroke Mariner. With 2 guys, decoys and gear it will get up and go. Weight difference for 15 vs 9.9 in 2 stroke is minimal. Given the long run you intend to do to get to your location I would strongly recommend the 15 based on 30 years experience running the Higbee. Get a good spray shield to turn away any seas that may try to join you in the cockpit. Get yourself a 12 foot closet pole from Home Depot and put a ?duckfoot? base on it and your push pole will serve you well navigating in skinny water. A better option than rowing in my opinion. They are great boats and will serve you well in the back creeks where the black ducks dwell. Good luck!
- Tim Chelius
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Re: HP required to plane 12ft Higher BBSB. In reply to
Tim, thanks for the input. I am working on buying a 15hp Johnson or Evinrude 2 stroke (or at least a 9.9 that I can convert by changing the carburetor), also I need to dig my duckfoot pushpole out of the shed.

The biggest hesitation I have is trailering the 9.9/15hp vs. the lighter 8HP OMC that I am considering. One spot I like to hunt has 5 miles of bumpy dirt roads to get to launch point. Even if I use a Transom Saver I am concerned about overstressing my Higbee's transom. I agree that, once the rig is launched, there is much more safety margin with the 15hp vs. 9.9 or 8hp.
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Re: HP required to plane 12ft Higher BBSB. In reply to
I should clarify that while on the road I would carry the 8hp in the cockpit of my Higbee or in my SUV, placing the 8hp on transom before launch. So the long bumpy road would be less ofoa concern. Whereas the 9.9/15 is a bit too heavy for my aging lower back to handle this on/off routine. I could also lock the 8hp in my vehicle when needed.
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Re: HP required to plane 12ft Higher BBSB. In reply to
The difference in weight between my 8 hp merc and 15 hp merc 2 strokes is 3 lbs. 9 hp 2 stroke merc same as 15. Both 8 & 15 are 90,s versions.
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Re: HP required to plane 12ft Higher BBSB. In reply to
Roy, thanks for input. And I'll apologize in advance to All for a long post.

On the Mercury outboards with only a 3 pound difference between 8hp and 15hp I too would definitely use the 15 instead of 8. What are the actual weights (or Model/serialNumbers--Mercury doesn't use Models, right?) of the 8 and 15 (with the 9hp being same weight as 15 in Mercury product line) ? It seems to me that the Mercury 8 is either quite heavy or the Mercury 15 is quite lightweight-- or maybe some of both.

I prefer Johnson/Evinrudes for 2 reasons (and admittedly maybe these are not really great reasons. Perhaps I need to "open my mind" a bit.). First reason is that I have been tinkering with OMC products for around 10 years, so that's where my hands-on experience (albeit limited) exists. Secondly, I have had trouble finding a knowledgeable and fairly-priced mechanic for small (< 40hp) outboards in our small town. I have found one good small outboard mechanic and he strongly prefers OMC's (and Yamahas). He claims that "Mercury's just blow up" and Suzuki's self-destruct via corrosion. Although I have friends with larger (>40hp) Mercurys) and their experiences have been no worse than my experience with my 90HP 2000 Johnson, I am inclined to stay with OMC's based on my mechanic's advice.

So...here are the weights that I know for OMC's. I have a 1969 6hp Model 6R69 Johnson (runs great!) listed Weight on iboats website is 51# (I weighed it at 54# --so there is a 3 lbs discrepancy). I am considering purchase of a 1985 Evinrude 8RCO which iboats lists as 56# (and Sellers have weighed at 56 to 58#). I am also considering purchase of a 1986 9.9 Johnson 10RCD which iboats lists as 72#. iboats also lists 1986 15HP Johnson 15RC as 72#. So in the Johnson/Evinrude product line there is a 16# difference between 8HP and 9.9/15hp. This makes sense as I understand only difference 9.9 vs. 15 is carburetor.
That 16# difference seems significant when I am hanging it on my Higbee's transom, or lifting it with my aging lower back (I spent a year or so getting chiropractor fix on my back not long ago).

A couple years ago I bought a really sweet used Mercury 6hp (s/n was either 3372456 or J3061988--my records are unclear). It weighed a whopping 70 lbs! This is compared to 54# on my 1969 Johnson 6hp 6R69M. But if a Mercury 9.9 or 15hp weighed only 73lbs (=70 +3) then that would be comparable to OMC weights.

I will do some more searching on websites for Mercury 9.9/15 weights--maybe I am missing some good deals on a used Merc.

Thanks again for all inputs.
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Re: HP required to plane 12ft Higher BBSB. In reply to
Guessing that 6 hp merc you bought was made on 8hp block. Merc has a tendency to do that within their old small 2 strokes. I,ll check the year on my 15 for you .
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Re: HP required to plane 12ft Higher BBSB. In reply to
David Clites wrote:
Tim, thanks for the input. I am working on buying a 15hp Johnson or Evinrude 2 stroke (or at least a 9.9 that I can convert by changing the carburetor).



David, Just a point of clarification concerning the OMC 9.9 to 15 hp. conversion. Changing the carb alone will not be a complete conversion and will not produce 15 hp.

The inner exhaust housing MUST be swapped out for the one designed for the 15hp engines. ( one can look at the parts list for both engines and see that these parts are in fact different)

Failure to make BOTH modifications will result in less than the desired HP increase.

Take care, Huntindave McCann Smile SHELL ROCK IA “As sailors grow older, the wiser ones move to smaller boats.” —Thomas Firth Jones, Multihull Voyaging

Last edited by:

Huntindave McCann: Mar 21, 2019, 7:16 AM