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Author Topic:   Motor weight concerns- 13' Whaler
awares posted 02-06-2001 09:59 PM ET (US)   Profile for awares   Send Email to awares  
I am really interested in the new Mercury 40hp fourstroke engine. I am very concerned
about the engine weight of 204lbs. Previously I was running a 1976 40hp Johnson that weighed 137lbs. I need the short shaft
engine to accomandate my 1968 Whaler. Can anyone help me with this because I am now ready to buy a new motor. I am very confused
and concerned that I select the correct motor. I have always been a OMC owner. I will be stepping out of my comfort zone on this buy. What I want in a motor is electric start, 15" shaft, trim and 40hp. Mercury does not offer a 15" shaft with trim. Please share your ideas and help me get this boat back in the water. Also is there anyone out there running the new 40hp fourstroke?Thanks
whalernut posted 02-06-2001 11:34 PM ET (US)     Profile for whalernut  Send Email to whalernut     
Awares, I would not put 204lbs. on the back of a 68` `13 Whaler. In my opinion that is about 54 lbs. to much. As far as other brands, Tohatsu/Nissan or Yamaha, and maybee Suzuki or Daihatsu(if their still in business)? Good luck-Jack Graner.
david in boston posted 02-07-2001 09:03 AM ET (US)     Profile for david in boston  Send Email to david in boston     
check out this web site for tohatsu engines, it is where I got my 70 hp for my montauk. The guy I spoke with is Chris Collins. great prices, great service, delivered to your door. good luck, David Vergara
tbyrne posted 02-07-2001 09:37 AM ET (US)     Profile for tbyrne    
Awares, have you considered Yamaha? Their 4-stroke 40 weighs 181 lbs. and their 4-stroke 25 weighs 136 lbs. They have the same powerhead as the Merc 4-strokes (Yamaha makes them for Merc) and are offered in 15" and 20" shart lengths. While the 40 is still pretty heavy, maybe you could get away with the 25. BTW, I strongly advise opting for power trim if available.
JimU posted 02-07-2001 12:16 PM ET (US)     Profile for JimU  Send Email to JimU     
My 2 Cents. Stick a 40 hp two stroke Yam with T&T and don't look back. Good luck. JIM
2001 13 Sport Owner posted 02-07-2001 12:17 PM ET (US)     Profile for 2001 13 Sport Owner  Send Email to 2001 13 Sport Owner     
Does anyone know the differnce between Yamaha's 40 HP 4-stoke versus the Mercury 40 HP 4-stroke. Went to the webpages for both companies and it looks as if the Yamaha 4-stroke weighs about 47 pounds less than the Mercury. What is the difference?
bigz posted 02-07-2001 01:00 PM ET (US)     Profile for bigz    
Apparently Yamaha doesn't make the Mercury 40hp 4 stroke (according to a recent post by "dgp" under the topic Mercury/Yamaha 4 stroke OB Joint Venture in this forum area)-- now how Yam differs from how Merc is making there 40hp is anyone's guess -- Clark Roberts might have the answer
Clark Roberts posted 02-07-2001 06:09 PM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
I don't know!
tbyrne posted 02-07-2001 06:25 PM ET (US)     Profile for tbyrne    
I think the weight difference is due to the Bigfoot gearcase (2.42:1) on the Merc. I know the Bigfoot it was designed as a heavy duty gearcase capable of running larger diameter props, but I don't think it makes sense on a 25 h.p motor that drives a small runabout boat. It makes more sense in a heavy duty application (sailboat, fully displacement hull, etc...). Nonetheless, it drives my 2000 Sport 13 pretty well.
bigz posted 02-08-2001 01:52 PM ET (US)     Profile for bigz    
Tom B I think he was talking about the standard 4 stroke 40 Merc at 204lbs, the 40 Big Foot hits the scales at 228lbs.

One of the best ecomonical choices unless you have to have a 4 stroke, is the Tohatsu/Nissan short shaft 40 auto mix with power t&t -- priced well with a list of $4250 (discounted by most dealers) and I understand made well 2 year warranty-- the basic weights in around 160 lbs.

A Yamaha 40 4 stroke at 180lbs or so would be the answer in the 4 stroke direction.

Just some thoughts -- Tom

tbyrne posted 02-08-2001 04:25 PM ET (US)     Profile for tbyrne    
Tom, you're absolutely right - I guess I got confused because I was thinking about the Bigfoot 25 I own. I was surprised that it was set up with such a heavy gearcase, bringing its weight to 175 lbs.

As I said previously, it doesn't make a lot of sense to me to put the heaviest gearcase around on a four-strike, which is arguably the heaviest powerhead set-up. I knew it going in though, and it was one of the many compromises we boaters make all the time.

With that said, the four-stroke runs like a top - one click of the key, no fumes, easy on fuel, no 50:1 oil to deal with. And in my mind, the PT&T is the best feature of all - my 1975 13'4" cried out for it!

The Tohatsu is a good suggestion, too. I imagine I'll have lots of choices when it comes time to repower in (hopefully) 10 or 12 years. It should be fun.

2001 13 Sport Owner posted 02-09-2001 10:19 AM ET (US)     Profile for 2001 13 Sport Owner  Send Email to 2001 13 Sport Owner     
More questions about the Mercury 25 Horsepower 4 Stoke Bigfoot. Tbyrne you mentioned that this engine has a very heavy gearcase! Does this mean that this gear case is considered more rugged than other types of gear cases? Also what are the advantages of having such heavy gear case?
bigz posted 02-09-2001 12:33 PM ET (US)     Profile for bigz    
Oh come on now Tom B -- 10 or 12 years --- heh heh you did say that 25 4 stoker was a Merc now didn't you -- just kidding just kidding --- the devil made me say it --

I know you'll have great luck with it and happy to hear your happy that's what counts --

I have a 1989 Force 35 (which came with our '89 13 Sport bought used this past summer both were sold new in '90) no pt&t but I lucked out a dealer in Norfolk VA had the OEM pt&t units complete (these were dealer installed option packages for the force 35 and 50 hp back then), retail was like $600 they were dumping them for $187-- yep it now has a pt&t unit --- the engine doesn't have 50 hours on it or the 13 for that matter ---

Got to soup this 35 up -- so adding a jack plate, dole fin and maybe even change the reeds --- have to get her faster than Clark Robert's Little Red 13 -- which flies -- heh heh --

Take care Tom

tbyrne posted 02-09-2001 05:01 PM ET (US)     Profile for tbyrne    
2001, I would hope that the Bigfoot gearcase is "heavy duty" and not just "heavy", but to tell you the truth, I don't know. I would surmise that at least one gear has more teeth than a 2:1 gearcase - I guess the pinion gear could have LESS teeth, thereby raising the overall ratio, but I am no expert in this area. Can anyone here shed some light on this one?
dgp posted 02-09-2001 05:55 PM ET (US)     Profile for dgp  Send Email to dgp     
Mercury sez the gears and shafts in the Big Foot lower unit are a third larger than the standard unit and this allows you to swing a bigger prop. The gearcase is taller which causes the prop to sit lower in the water and they have bigger anit-cavitation plates.
These are designed for heavy load applications like "party barges" or sailbotes. Don
RHLOOS posted 02-10-2001 12:13 PM ET (US)     Profile for RHLOOS  Send Email to RHLOOS     
I have the 4 stroke 40 hp Yamaha on my 1966 13 ft BW. I love it, decrease in noise, exhaust, and the gas mileage can't be beat, although it does sit lower in the water now. I ordered it with PT&T. After looking at the motor and talking to BW, I had to switch to the 15" shaft. Dropped my boat off, the motor was mounted , went to pick it up and the fist thing I did was hit the PT&T switch on the side of the motor. The dealer then told me "Oh, sorry 15" shaft doesn't come with PT&T. I called Yamaha some engineers said it could be done easily, others weren't sure. They sent me all the diagrams and literature. It looks possibible to me, any suggestions ?
willyjoe1 posted 02-15-2001 01:33 AM ET (US)     Profile for willyjoe1  Send Email to willyjoe1     
i has the 1998 40 hp yamaha with power t/t on my 86 13',motor weight about 200 lbs.the power t/t really make the boat performs better,but the motor set lower in the water, that is the problem i love fishing at the bay, at this time the year, the bay is real shallow,laterly i think to put the CMC 5"vertical extension"14lbs" or manual jackplate"32lbs"with 5" set back, to left the motor up, so i can run the boat in the shallow bayou,is it alright to put another 32lbs on this little 13? please give me some thoughts, thanks
2001 13 Sport Owner posted 02-16-2001 04:38 PM ET (US)     Profile for 2001 13 Sport Owner  Send Email to 2001 13 Sport Owner     
Just recently purchased a 13 Sport with the Mercury 25 Horsepower 4-Stroke. I am pleased with the boat but wish I had more power. I am thinking about upgrading my engine to Yamaha 2-Stroke 40 or 50 Horsepower. The 40 and 50 Yamaha both weigh the same and are much lighter than the 25 Horse 4-stoke that is currently on the boat. Would appreciate any thoughts on this!
willyjoe1 posted 02-17-2001 10:05 AM ET (US)     Profile for willyjoe1  Send Email to willyjoe1     
13 owner, my 40hp motor the top speed is high 40, i think you really don't need that 50,only thing you have to look at is 15" or 20" shafts,with you use this 13 most time at shallow water, the 15" shaft is best, 20" shaft hvae to rise the motor, i use my 13 for hunting and winter fishing,winter fishing is best at the bay, but the north wind push water out of bay, when low tide is even worse, hope this help
Bill Davis posted 02-17-2001 10:15 AM ET (US)     Profile for Bill Davis  Send Email to Bill Davis     
13 owner: methinks the coast guard rating on that boat is 40 hp max. Check that out.


RHLOOS posted 02-17-2001 11:35 AM ET (US)     Profile for RHLOOS  Send Email to RHLOOS     
13 owner, i'm very sure that your boat is rated for 40hp max. the yamaha 2 stroke 40hp weighs 190lbs. i'd bet that your 25hp. is equal (2001 yamaha 25hp. 15" shaft is shown in book at 144lbs.) stay with what you have, this is not a performance boat, it's a 13' whaler(wonderful boat) you double your range (quitely) with 6 gal. tank you have a great set-up
2001 13 Sport Owner posted 02-17-2001 02:37 PM ET (US)     Profile for 2001 13 Sport Owner  Send Email to 2001 13 Sport Owner     
Thanks for all the input. Will stick with what I have for now. Maybe in a few years will repower with a 40HP.

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