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Author Topic:   Short Shaft Outboards For 1971 13-foot

Gina posted 04-23-2003 05:54 PM ET (US)
Since the transom is lower than the newer models, what is the most horsepower that can be used without being too heavy? And what brand of short shaft motor is recommended?
whalernut posted 04-23-2003 06:20 PM ET (US)
I had a 1971 `13 Sport and it had a 1976 35 h.p. 2 cyl Evinrude with a 15" Shaft. The max horespower is 40, and the shaft length is 15". I think a 40 is a little too heavey for the older lighter hulls, my 35 was much lighter than the 40. I beleive the equivelant to the older 35`s is a 30 h.p. 2 cyl. Jack.
Bigshot posted 04-24-2003 09:49 AM ET (US)
A 2cyl 30hp would be a great engine.
andygere posted 04-24-2003 04:32 PM ET (US)
If you want a new motor with tilt and trim, your choices are somewhat limited for the required 15" (short shaft) motor. Tohatsu/Nissan still makes a 2-stroke 40 hp that has tilt and trim in the 15" size.
jimp posted 04-24-2003 05:44 PM ET (US)
Gina -
Depends on what you're going to do and what's too heavy...
I grew up on Great Peconic Bay with a 1963 13' Sport with a 33 Johnson on it. We could take the gear out and leave it on the mooring and it would take on some water, but not a lot. After the 33 blew, we got a 40, a bit heavier, a bit more water.
The 40 was better for waterskiing. But heavy when 2 kids tried to pull the boat off the beach. Back in '66-'81 we had manual start and no battery.
JimP
JBCornwell posted 04-24-2003 06:36 PM ET (US)
Ahoy, Gina.
I have run my 13s with 15, 25, 40 and 50HP, all OMCs.
The 15 was not enough for more load than a 100LB youngster.
The 25 was great. 25-27mph with 2.5 persons and fishing gear. Well balanced and easy to handle.
The 40 was a rocket sled. Near 40mph WOT. Pulled 2 skiers. Less agile and harder to manage than the 25.
The 50 was too much for me. Same weight as the 40, but prone to chine walking and too fast for a 13 (well over 45mph). Scared hell out of me and I wouldn't let my son use it.
Had I another 13 I would put a 25 on it. I think that new lightweight Honda is a 25.
Second choice would be Tohatsu electric start with T&T.
Red sky at night. . .
JB
Bigshot posted 04-25-2003 08:49 AM ET (US)
Jb? TSK....TSK! Overpowering a Whaler, shame on you :)
JBCornwell posted 04-25-2003 09:21 AM ET (US)
Touche', Biggie.
I bought it that way. Swapped it for a 25.
Red sky at night.. .
JB
jimh posted 04-26-2003 09:39 AM ET (US)
[Changed TOPIC; was "size outboard for 1971 13 foot whaler."]
mcollinstn posted 04-28-2003 02:30 PM ET (US)
I had a 13' with a '67 33 Evinrude. Ran just over 30mph with one kid and kicked out far enough to just begin porpoising.
Now have a 13' with a '85 30 Johnson that runs almost identically except the Johnson is lighter and smaller.
I just bought a 50hp Johnson short shaft with power trim that I plan to mount up. I have the boat at a glass shop as we speak getting a few places repaired and the transom flattened out for the big motor bracket. OMC made shortys up to 60hp and also with power trim if it is of interest to you.
I do expect the boat to fly, but I don't think the 50hp I have is much heavier than the old 33 I had years ago (I could be wrong - I don't really know the weight of the old 33, and I was 11 at the time so it sure FELT heavy back then).
I'm gonna turn my boy loose in this boat, and really got the big motor cause of the huge innertubes they like to pull these days. I expect that I will need to manufacture a throttle stop to keep the speeds down until he gets his "racing reflexes". That way the motor will still kick out huge torque for innertubes, but not rev out far enough to hurt him.
The OMC 40 was also available in a shorty with and without trim. Trim adds about 20 pounds, but is worth its weight in gold if you do much putting around in shallows...
Also, if weight is a concern for you, a standard battery weighs 47 pounds while a jetski battery weighs 16 pounds. If it scares you to rely on a jetski battery, remember that jetskis come as large as 1300cc with 140 horsepower. They have no problems with the small batteries...
If you worry about the transom sitting too low, put some weight in the nose of the boat.
With that said, I guess I may have a 30hp johnson for sale soon..

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Author	Topic: Short Shaft Outboards For 1971 13-foot
Gina	posted 04-23-2003 05:54 PM ET (US) Since the transom is lower than the newer models, what is the most horsepower that can be used without being too heavy? And what brand of short shaft motor is recommended?
whalernut	posted 04-23-2003 06:20 PM ET (US) I had a 1971 `13 Sport and it had a 1976 35 h.p. 2 cyl Evinrude with a 15" Shaft. The max horespower is 40, and the shaft length is 15". I think a 40 is a little too heavey for the older lighter hulls, my 35 was much lighter than the 40. I beleive the equivelant to the older 35`s is a 30 h.p. 2 cyl. Jack.
Bigshot	posted 04-24-2003 09:49 AM ET (US) A 2cyl 30hp would be a great engine.
andygere	posted 04-24-2003 04:32 PM ET (US) If you want a new motor with tilt and trim, your choices are somewhat limited for the required 15" (short shaft) motor. Tohatsu/Nissan still makes a 2-stroke 40 hp that has tilt and trim in the 15" size.
jimp	posted 04-24-2003 05:44 PM ET (US) Gina - Depends on what you're going to do and what's too heavy... I grew up on Great Peconic Bay with a 1963 13' Sport with a 33 Johnson on it. We could take the gear out and leave it on the mooring and it would take on some water, but not a lot. After the 33 blew, we got a 40, a bit heavier, a bit more water. The 40 was better for waterskiing. But heavy when 2 kids tried to pull the boat off the beach. Back in '66-'81 we had manual start and no battery. JimP
JBCornwell	posted 04-24-2003 06:36 PM ET (US) Ahoy, Gina. I have run my 13s with 15, 25, 40 and 50HP, all OMCs. The 15 was not enough for more load than a 100LB youngster. The 25 was great. 25-27mph with 2.5 persons and fishing gear. Well balanced and easy to handle. The 40 was a rocket sled. Near 40mph WOT. Pulled 2 skiers. Less agile and harder to manage than the 25. The 50 was too much for me. Same weight as the 40, but prone to chine walking and too fast for a 13 (well over 45mph). Scared hell out of me and I wouldn't let my son use it. Had I another 13 I would put a 25 on it. I think that new lightweight Honda is a 25. Second choice would be Tohatsu electric start with T&T. Red sky at night. . . JB
Bigshot	posted 04-25-2003 08:49 AM ET (US) Jb? TSK....TSK! Overpowering a Whaler, shame on you :)
JBCornwell	posted 04-25-2003 09:21 AM ET (US) Touche', Biggie. I bought it that way. Swapped it for a 25. Red sky at night.. . JB
jimh	posted 04-26-2003 09:39 AM ET (US) [Changed TOPIC; was "size outboard for 1971 13 foot whaler."]
mcollinstn	posted 04-28-2003 02:30 PM ET (US) I had a 13' with a '67 33 Evinrude. Ran just over 30mph with one kid and kicked out far enough to just begin porpoising. Now have a 13' with a '85 30 Johnson that runs almost identically except the Johnson is lighter and smaller. I just bought a 50hp Johnson short shaft with power trim that I plan to mount up. I have the boat at a glass shop as we speak getting a few places repaired and the transom flattened out for the big motor bracket. OMC made shortys up to 60hp and also with power trim if it is of interest to you. I do expect the boat to fly, but I don't think the 50hp I have is much heavier than the old 33 I had years ago (I could be wrong - I don't really know the weight of the old 33, and I was 11 at the time so it sure FELT heavy back then). I'm gonna turn my boy loose in this boat, and really got the big motor cause of the huge innertubes they like to pull these days. I expect that I will need to manufacture a throttle stop to keep the speeds down until he gets his "racing reflexes". That way the motor will still kick out huge torque for innertubes, but not rev out far enough to hurt him. The OMC 40 was also available in a shorty with and without trim. Trim adds about 20 pounds, but is worth its weight in gold if you do much putting around in shallows... Also, if weight is a concern for you, a standard battery weighs 47 pounds while a jetski battery weighs 16 pounds. If it scares you to rely on a jetski battery, remember that jetskis come as large as 1300cc with 140 horsepower. They have no problems with the small batteries... If you worry about the transom sitting too low, put some weight in the nose of the boat. With that said, I guess I may have a 30hp johnson for sale soon..