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Author Topic:   15-footer with 40-HP Two-stroke

Binkster posted 05-27-2014 02:34 PM ET (US)
[To readers who have] run a 15-foot Whaler with a 40-HP two-stroke: what kind of performance did you get? Will it plane with three passengers?
rich
bloller posted 05-27-2014 06:08 PM ET (US)
My friend once had one with a 40hp. Did not seem underpowered with me and him on it. I once rode next to one with a 25hp outboard and it planned just fine with its single occupant
dgoodhue posted 05-27-2014 10:02 PM ET (US)
Jamber had a 15' with a 40hp 2 stroke OMC. It didn't even have power trim and I think it top out at around 30mph.
leadsled posted 05-28-2014 05:48 AM ET (US)
I had a 1976 sport 15 with a mid 80's Johnson 40 and it ran close to 35 mph. In fact I remember having a friend drive it while I skied behind it. I used the spare prop which had a lower pitch.
1oldman posted 05-28-2014 12:56 PM ET (US)
I am running an '84' 15'Sport with an '87' 40hp Johnson. This boat is carrying a good bit of extra weight; 2 batteries, trolling motor on the front, fiberglass CC w/built in 14gal tank plus I weigh 260#. I added a T-n-T(more wgt.) and according to my gps it runs 30mph.
Jamber posted 06-03-2014 03:34 PM ET (US)
Hi Rich -
Yes. I still have my 15 ft Super Sport with a 1993 Johnson 40hp 2 stroke. GPS is 30mph with my wife, couple of small kids and myself (about 360 lbs total). I have been happy with the performance, but I know I would enjoy a higher top speed.
The 40 Johnson 2 stroke is impressive on the 15 ft Whaler.
One time I was about to go out for a quick ride with my son and daughter when my brother-in-law pulled up with his wife and three small kids. So I invited them along. Just as we were about to pull away from the dock my wife pulled up and wanted to join us, even though she is just about 100 lbs, I was very apprehensive about the safety of now being close to overloading the Whaler. I calculated 780+ lbs in people (plus engine 180 lbs, fuel (6 gal) and gear (? lbs). Right around the the 1000 lbs capacity of the 15 ft hull.
We all had PFDs, careful positioned everyone on the boat and stayed close to shore in very calm and relatively shallow waters. Freeboard was reduced, but not by much. It handled very well. It took twice as long and WOT, but I was still able to plane off.
With that said, I am seriously considering a re-power. My kids are growing, they want to tube more (and one day try water skiing/wakeboarding), plus I would like to do 40+mph. My Whaler is currently in "dry dock" as I am slowly refinishing the wood, adding a jack-plate, replacing drain tubes and new steering. Now would be a perfect time to replace the 21 year old 40hp. I have my eyes on the new 60 E-Tec.
jimh posted 06-04-2014 11:30 AM ET (US)
My 1976 SPORT 15 had a 1976 Mercury 500. I think the engine was rated 50-HP at the crankshaft, so maybe not 50-HP at the propeller--who really knows. It was a fast little boat. As best as I can recall, its top speed was about 34-MPH as measured by a very old GPS receiver not using any sort of augmentation of precision like WAAS.
fritzmerde posted 07-19-2014 10:50 PM ET (US)
I have a Merc. Classic Fifty (45hp)on my Sport. I never bothered to do a weight & balance but I'm 215, my wife 125,my sons 200lbs & misc maybe 60lbs. It's pushing it & it usually requires a few shifts. It'll get you from A to B but if your embarrassed easily avoid going near sailboats. Usually my wife stays home & the boys are hit or miss but it's usually 3 bodies on board.It'll plane & depending on conditions I've seen as low as 22K & as high as 34K.I usually plan for 25k on fishing & crabbing trips, rough WX days on the bay 20K. My neighbor has a 30hp Merc. on his but it's usually just him.
mkelly posted 07-21-2014 01:16 PM ET (US)
Love the E-TEC idea, we repowered a couple years ago with the Yamaha F60....would like the F70 but not complaining. Runs great, quiet & barely sips gas. Not having to worry about oil is also fantastic.
elvis posted 07-25-2014 12:45 PM ET (US)
I have a 1985 15' with a 1991 Evinrude 48, one battery, 12 gallon tank, stock wood plank seats, hull not waterlogged. Runs 31 with 2 adults, SS prop.
Gets up on plane very quickly.
sjp2 posted 07-29-2014 05:22 AM ET (US)
i have a 40 yamaha on my 13 and only manage 54 klm(33 miles)with just the 2 of us ,is that average for a 13,maybe i should look at my prop as well,i don't have any gauges to find out about revs etc .

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Author	Topic: 15-footer with 40-HP Two-stroke
Binkster	posted 05-27-2014 02:34 PM ET (US) [To readers who have] run a 15-foot Whaler with a 40-HP two-stroke: what kind of performance did you get? Will it plane with three passengers? rich
bloller	posted 05-27-2014 06:08 PM ET (US) My friend once had one with a 40hp. Did not seem underpowered with me and him on it. I once rode next to one with a 25hp outboard and it planned just fine with its single occupant
dgoodhue	posted 05-27-2014 10:02 PM ET (US) Jamber had a 15' with a 40hp 2 stroke OMC. It didn't even have power trim and I think it top out at around 30mph.
leadsled	posted 05-28-2014 05:48 AM ET (US) I had a 1976 sport 15 with a mid 80's Johnson 40 and it ran close to 35 mph. In fact I remember having a friend drive it while I skied behind it. I used the spare prop which had a lower pitch.
1oldman	posted 05-28-2014 12:56 PM ET (US) I am running an '84' 15'Sport with an '87' 40hp Johnson. This boat is carrying a good bit of extra weight; 2 batteries, trolling motor on the front, fiberglass CC w/built in 14gal tank plus I weigh 260#. I added a T-n-T(more wgt.) and according to my gps it runs 30mph.
Jamber	posted 06-03-2014 03:34 PM ET (US) Hi Rich - Yes. I still have my 15 ft Super Sport with a 1993 Johnson 40hp 2 stroke. GPS is 30mph with my wife, couple of small kids and myself (about 360 lbs total). I have been happy with the performance, but I know I would enjoy a higher top speed. The 40 Johnson 2 stroke is impressive on the 15 ft Whaler. One time I was about to go out for a quick ride with my son and daughter when my brother-in-law pulled up with his wife and three small kids. So I invited them along. Just as we were about to pull away from the dock my wife pulled up and wanted to join us, even though she is just about 100 lbs, I was very apprehensive about the safety of now being close to overloading the Whaler. I calculated 780+ lbs in people (plus engine 180 lbs, fuel (6 gal) and gear (? lbs). Right around the the 1000 lbs capacity of the 15 ft hull. We all had PFDs, careful positioned everyone on the boat and stayed close to shore in very calm and relatively shallow waters. Freeboard was reduced, but not by much. It handled very well. It took twice as long and WOT, but I was still able to plane off. With that said, I am seriously considering a re-power. My kids are growing, they want to tube more (and one day try water skiing/wakeboarding), plus I would like to do 40+mph. My Whaler is currently in "dry dock" as I am slowly refinishing the wood, adding a jack-plate, replacing drain tubes and new steering. Now would be a perfect time to replace the 21 year old 40hp. I have my eyes on the new 60 E-Tec.
jimh	posted 06-04-2014 11:30 AM ET (US) My 1976 SPORT 15 had a 1976 Mercury 500. I think the engine was rated 50-HP at the crankshaft, so maybe not 50-HP at the propeller--who really knows. It was a fast little boat. As best as I can recall, its top speed was about 34-MPH as measured by a very old GPS receiver not using any sort of augmentation of precision like WAAS.
fritzmerde	posted 07-19-2014 10:50 PM ET (US) I have a Merc. Classic Fifty (45hp)on my Sport. I never bothered to do a weight & balance but I'm 215, my wife 125,my sons 200lbs & misc maybe 60lbs. It's pushing it & it usually requires a few shifts. It'll get you from A to B but if your embarrassed easily avoid going near sailboats. Usually my wife stays home & the boys are hit or miss but it's usually 3 bodies on board.It'll plane & depending on conditions I've seen as low as 22K & as high as 34K.I usually plan for 25k on fishing & crabbing trips, rough WX days on the bay 20K. My neighbor has a 30hp Merc. on his but it's usually just him.
mkelly	posted 07-21-2014 01:16 PM ET (US) Love the E-TEC idea, we repowered a couple years ago with the Yamaha F60....would like the F70 but not complaining. Runs great, quiet & barely sips gas. Not having to worry about oil is also fantastic.
elvis	posted 07-25-2014 12:45 PM ET (US) I have a 1985 15' with a 1991 Evinrude 48, one battery, 12 gallon tank, stock wood plank seats, hull not waterlogged. Runs 31 with 2 adults, SS prop. Gets up on plane very quickly.
sjp2	posted 07-29-2014 05:22 AM ET (US) i have a 40 yamaha on my 13 and only manage 54 klm(33 miles)with just the 2 of us ,is that average for a 13,maybe i should look at my prop as well,i don't have any gauges to find out about revs etc .