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  HP for a 74 110 sport

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Author Topic:   HP for a 74 110 sport
110 whaler posted 02-19-2004 12:07 PM ET (US)   Profile for 110 whaler   Send Email to 110 whaler  


Last summer I bought a 1974 BW sport. I put a 9.8 Merc., on it and it wouldnt plane. I now have either a 15 OMC or a 25 MERC. I dont want to over power it, but i am not sure if the 15 will be enough. Any thoughts?

JBCornwell posted 02-19-2004 02:54 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
I am sure you are talking about a Sport 11. The 110 wasn't made until this millenium.

Max HP rating is 20hp, but a 15 should plane it with medium or less load.

Red sky at night. . .
JB

Bigshot posted 02-19-2004 03:20 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Actually the old Merc 9.8's were called 110's....never understood that.

Should plane with a 9.8 but not well. The 15 will do it but 25 would be better. Boat will hand le a 25 no problem. Their 1982 brochure shows one with a 25hp....never understood that either.

110 whaler posted 02-19-2004 06:53 PM ET (US)     Profile for 110 whaler  Send Email to 110 whaler     
I am new to the BW Groupe,So it may not be a sport, but it does have a wheel and remote controls. I think it is rated for 10 hp, but as I am in Canada, its under 4 feet of snow...covered though!
Bigshot posted 02-20-2004 10:25 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
With wheel and controls it brings it up to a 20hp max and makes it a sport 11.
rbruce posted 02-21-2004 09:22 PM ET (US)     Profile for rbruce  Send Email to rbruce     
I have a 1986 Sport 11 mated to a Chrysler 20 HP from 1969 that stood idle in our garage until last year!

My motor has 19.96 cu.in. (324 cc) displacement and an 8 1/2" diameter X 8 1/2" pitch propeller. I was clocked at 22 mph with my brother 82 kg in front, my own 82 kg in the rear and a full 6 1/2 gallon tank of unleaded premix at wide open throttle. My Chrysler alone is 72 lbs. This motor is in very good shape, however, it feels slow and it takes a while to get this small boat into plane. Once you are in plane it cruises at a nice pace and a small lake seems very small.

In a 5 hour journey from Puerto Viejo, Costa Rica to Río Indio, Nicaragua, the motor felt underpowered on the last two hours of the leg, but the boat was very heavy and I had to constantly stop to check the propeller for weeds and logs that attached to the leg. I used around 9 gallons of premix on the way down river at wide open throttle on 5 hours, not bad for an old Chrysler. On the way up having the fuel mixed with super unleaded and regular, plus abrasions from shallow waters that hurt my brand new 6 bladed impeller, the motor started to overheat and I called it quits but at least we were in Costarican territory.

I have been warned against overpowering this boat for all the liability and safety issues and perhaps it will not do any good. I have located a 1979 Chrysler 20 with 28.87 cu.in. (468 cc) that came standard with a 10 3/8" diameter X 12 1/2" propeller. This should get the boat faster into plane and it will not challenge the USCG maximum power recommendation for this boat. But if my conscience and budget would allow I would choose either a 25 HP Mercury or a 25 HP Johnson the latter, with the largest displacement of all the motors that I checked.

I have also looked into a 20 HP Honda four stroke with a 4 bladed propeller but the motor is a bit more heavy and I feel 4 strokes are way too complicated to maintain than 2 strokes, I might be wrong. Also look into the Tohatsu 18 HP 4 stroke which might be what you need in a budget sense. These new motors have different gear ratios and larger propellers than my father's Chrysler and as they say, time does not go by in vane.

ryanwhaler posted 02-22-2004 08:18 PM ET (US)     Profile for ryanwhaler  Send Email to ryanwhaler     
In 1974 they made the 11foot hull as a "11-Tender" and a "11-Sport"

If you have a steering wheel you have the sport model.

When I bought my 1975 11-Sport she was powered with a 1987 8hp Mercury. With one person it would jump up on a plane no problem. You must be really loading your boat down, there's no reason why is shouldn't plane with a 9.8, unless the motor has problems or the hull us waterlogged.

I wasn't happy with a 8hp. It was underpowered with more then one person. I was all ready to buy a new 25hp 2 stroke Merc when I found a new old stock 15hp Mercury on ebay, for almost half what it cost new. I bought it for twelve hundred bucks, it was a 1990 that had never been started.

After using the boat with a 15hp, I don't see why anyone would want to put anything bigger on this hull. When I'm by myself the thing screams, I don't have a GPS but I'd guess low 20's, which feels much faster in such a small boat.

I'd only go with a 25 if you are going to be using the boat with more then 3 people. WIth 3 "full size" adults the 15 will feel a bit week. How many people do you want to carry?

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