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Author Topic:   Boston Whaler 13 Power
f14bombcat posted 03-10-2003 04:53 PM ET (US)   Profile for f14bombcat   Send Email to f14bombcat  
Any suggestions as to what to put on back of a 13-foot hull? Not sure what year the hull is. I am looking for one in both the boat trader and local paper. It would probably be used on Lake Erie and Chautauqua. Might even be used in Fripp Island, SC. As for price, the less the better. I know this isn't the best attitude, but I want the best boat for the buck. f14
JBCornwell posted 03-10-2003 05:10 PM ET (US)     Profile for JBCornwell  Send Email to JBCornwell     
Ahoy, F14.

A 25 is an excellent powerplant for a 13; light, easy to operate. Good for about 25mph.

If you want to spend for speed the OMC 40 of the 70s and 80s is a good choice. Goes like the devil.

Red sky at night. . .
JB

captbone posted 03-10-2003 06:58 PM ET (US)     Profile for captbone  Send Email to captbone     
I say go with 30hp Johnson 2 stroke, 2 cylinder. They are great engines, dependable, parts are easy to get and it is cheap. If you shop, you can find one new for around $2600.00
Bigshot posted 03-11-2003 09:12 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
You don't have a 13' yet but you want to know what to repower it with?
f14bombcat posted 03-11-2003 04:30 PM ET (US)     Profile for f14bombcat  Send Email to f14bombcat     
Bigshot, I am looking at 2 without motors and want an idea before I purchase one. F14
BQUICK posted 03-11-2003 04:43 PM ET (US)     Profile for BQUICK  Send Email to BQUICK     
I would avoid the 2 cyl Evinrudes and Johnsons (33, 35, 40, 48, 50hp). They are noisy, they vibrate at certain speeds and are built like lawnmower engines. I would recommend a Mercury or Yamaha. Have heard good things re: Tohatsu....but no first hand experience.

Also, I recommend more power than less so you don't have to run it wide open to go a decent speed.

PSW posted 03-11-2003 06:50 PM ET (US)     Profile for PSW  Send Email to PSW     
Really think about how fast you want to cruise and how much weight you may travel with when making your decision. I hear of some people recommending a 25 and cringe at how underpowered that must be. I had a 50 and to some that is overkill. All depends on what you use it for. I think picking the right hp is more important than make in this situation. They all have decent motors in that size range.

PSW

Over the LINE posted 03-11-2003 10:08 PM ET (US)     Profile for Over the LINE  Send Email to Over the LINE     
I had a 13 with a Merc 25 2 stroke and it did fine as long as I was not loaded. Cheap motor, easy on fuel and even had a backup pull starter. I now have a 13 with a Yamaha 50 2 stroke (used to have an Evinrude 48-"lawnmower engines" are great if you plan on pumping a lot of mud through them cause they will put up with all kinds of abuse). I think the 50 is a great motor for the 13 if you plan on loading it up. I have a friend with the same setup and he also just repowered with another 50. It really all depends on what you want to do. I will say one thing, the 13 with a 50 is not a boat for kids. The 13 with a 25 I sold to a good friend for his two young boys.
Drisney posted 03-11-2003 11:04 PM ET (US)     Profile for Drisney  Send Email to Drisney     
I just came in from Striper fishing with my 13 that has a mid eighties Johnson 25hp on it...with two Big guys (560 combined weight)
we were doing 21mph(gps) and it should go a little bit faster after I tweak a few things. I would like a little more power but this is really quite adequate as I was given the motor for free..... Dave
jimh posted 03-11-2003 11:18 PM ET (US)     Profile for jimh  Send Email to jimh     
[Administrative post]
logan posted 03-12-2003 12:17 AM ET (US)     Profile for logan  Send Email to logan     
I have a 13 with a late 80s suzuki and a pair of 250# people and 50 gallons of gas would plain fine and cruse at 22 knots (charted at slack water)
captbone posted 03-12-2003 02:18 AM ET (US)     Profile for captbone  Send Email to captbone     
That Suzuki must be a gas hog!
mike_oconnor posted 03-12-2003 08:19 AM ET (US)     Profile for mike_oconnor  Send Email to mike_oconnor     
I've got a truly gnarly beat-up classic 13. Another boat has expired, leaving a nice Yamaha oil-injected 2-cycle free to put on the back of the Whaler. I was thinking that was too much motor for the boat -- but comments in this thread imply that maybe I ought to rethink.

I worry that the boat would be too hot and that the teenage boys could get in trouble driving it.

Another question; I'm wondering about the weight of the motor being too much for the transom when i haul it around on a trailer. I'd hate to bust the transom off, going over a bump.

Finally, I'm wondering if the weight of the Yamaha (3 cylinder, early '90's vintage) is more than the Whaler folks were thinking of when they designed the boat. Those old 2-cylinder OMC 40's weighed a lot less. I was thinking that there wouldn't be much freeboard at the stern with the Yammr.

Any thoughts? Great thread!

Mike

BQUICK posted 03-12-2003 10:22 AM ET (US)     Profile for BQUICK  Send Email to BQUICK     
Try to get manual start....saves a bunch of weight. But 2 cyls are knuckle busters to start though without compression relief (which I believe the Yammy has).
My 8 yr old can start my 50 Merc 4 cyl when it is hot. Leaves the dock boys scratching their heads.....

Bruce

Bigshot posted 03-12-2003 11:17 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Mike....what size Yamaha?
JimU posted 03-12-2003 11:43 AM ET (US)     Profile for JimU  Send Email to JimU     
I have my 13 powered with a 40 Yam. It is a real screamer.
txrdb posted 03-12-2003 01:39 PM ET (US)     Profile for txrdb  Send Email to txrdb     
I had a 1962 13' Whaler w/ Evinrude 33 2 stroke. It went approx. 28 mph, handled great, and was a blast to drive. I always wanted more power though. I remember seeing my same boat at a marina on Lake George NY with a 65hp, Johnson 3 cylinder. It had a reinforced transom. I always wondered how that one handled and how fast it went. Anyway......memories....
PSW posted 03-12-2003 02:49 PM ET (US)     Profile for PSW  Send Email to PSW     
The transom is plenty strong enough to hold a 50. The only thing that you have to worry about is your static trim. It is not quite as good as with a lighter engine, but was never a problem for me. As far as kids go just prop it down.
mike_oconnor posted 03-12-2003 08:24 PM ET (US)     Profile for mike_oconnor  Send Email to mike_oconnor     
argh. sorry about that. the Yamaha is a 40hp. i was so intent on the questions i neglected that crucial piece of info.

doh! propping down, what a great idea for containing the kids...

Bigshot posted 03-13-2003 10:05 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
No propping down is a bad idea becaus eit will over rev and blow the engine. A governor is the way to go and could be as simple as a locking device to limit the throttle movement which you could remove when you drive. This however would make waterskiing difficult. A 40 yamaha only goes 5mph faster than a 25 but handles the weight better.
BQUICK posted 03-13-2003 10:14 AM ET (US)     Profile for BQUICK  Send Email to BQUICK     
25 only 5 mph faster than a 40?
In my experience a 25 will go about 25 with a 40 going, 35 to 45 mph lightly loaded. The 35 being a 60s/70s vintage rude or john 40hp and 45mph with a propshaft rated Merc or Yam.
Properly propped and trimmed, of course!

Bruce

Bigshot posted 03-13-2003 10:41 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
My 1982 powerhead rated 25hp Johnson would hit almost 31(GPS). A prop rated 40 yammies does not do much over 35. The 13' hull is so efficient that even with a 15hp it will do like 23. With a 50hp it might hit 38. Remember a 15' hull with a 30hp is faster than a 13' hull with a 30hp. A 15' with a 50hp will only do 36-37 so i doubt a 13 would do much more with a 50.
Over the LINE posted 03-13-2003 04:15 PM ET (US)     Profile for Over the LINE  Send Email to Over the LINE     
My 13' with a Merc 25 would run 29 (GPS) with me and a few gallons of fuel. My 13 with a 50 will run 37 (GPS) same load. The difference is, I can hold 30 with the 50hp with almost any load. I do know with the 50 I can tow another 13' onto a plane (I suppose in some minds that makes it a little overpowered). It all depends on what you want to do with the boat.
Both setups made me happy, the 50 is just beter for what I use the boat for (heavily loaded runs).
My friend tells me his boys (8 and 10) that now own my 13 w/ a 25 love it.
Bigshot posted 03-13-2003 04:36 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
My thoughts exactly. When I was a teen and weighed 100lbs wet that 25 was fast even with 2 friends along, you get 4 people and you knew it was only a 25. My last 13 had the same setup and with just me(200lbs) the sucker flew but it was basically like when me and my buddy were in it as teens(100lbs each).
BQUICK posted 03-13-2003 05:04 PM ET (US)     Profile for BQUICK  Send Email to BQUICK     
If a prop-rated 50 won't do 40 with 1 person on a 13, then there is something wrong.
My powerhead rated 50 can almost pull a skier at that speed. Tried barefoot but no-go.
Even the old 40 hp (powerhead) Mercs) would run close to 40. (used to work at a dealer and we would break the customers motors in for them, hehe....., all boats were sea-trialed unless the customer specifically said no)
f14bombcat posted 03-13-2003 05:10 PM ET (US)     Profile for f14bombcat  Send Email to f14bombcat     
Are there any things you would change about your 13' boston whaler? What do you like about it? f14
Bigshot posted 03-17-2003 09:09 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Bquick.....Get a GPS and give us some numbers.
timbo posted 03-20-2003 09:22 PM ET (US)     Profile for timbo  Send Email to timbo     
I have a 73 13' with a 91 40 yammy its a great motor, perhaps due to the very few hours of use the previous owner put on it but the boat screams i would assume at close to 40 mph and is tons of fun for this 15 year old and my friends.
Bigshot posted 03-21-2003 10:07 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
your assumption is right....close to 40 but don't race anyone who does 40 for pinkslips :)
BCPOLARIS posted 03-30-2003 02:14 PM ET (US)     Profile for BCPOLARIS  Send Email to BCPOLARIS     
I HAVE A 1997 13 DAUNTLESS WITH A 1997 YAMAHA TLRV50 50 HP MOTOR. BOAT IS LOADED WITH ELECTRONICS, GEAR, AND TOP. IT RUNS 48+ ON CALM WATER. BY THE WAY THE BOAT IS FOR SALE!
Bigshot posted 03-31-2003 09:56 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
13 dauntless with 50hp doing 48+? I have been on one with a 40hp and it would do low 30's. No offense but that is not GPS numbers either.
skred posted 04-02-2003 02:24 PM ET (US)     Profile for skred  Send Email to skred     
I owned a new 1989 Sport 13 with 30 Yamaha 2 cycle. With 2 adults and one kid, and assorted coolers, etc., it still went fast enough to make me nervous. No gps back then, but the speedo would read 37-39 at WOT. Excellent gas economy, too. Never wished for a 40 or larger. Even pulled my 165-lb son-in-law on slalom... I think it was the best balance of power and economy I ever experienced.

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