How much hp does it take to plane a 13' whaler?

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Author Topic:   How much hp does it take to plane a 13' whaler?

mantis posted 07-29-2009 09:53 AM ET (US)
Sorry if this question has been answered elsewhere. I need a new motor. Am considering new 4 stoke Nissan 15hp @ 120 lbs, but found used '06 4 stroke 25hp Honda @ 155-160lb (I think.) Wonder if: #1. Will 15hp get the 13' whaler to plane? #2. Is 25hp Honda too heavy for the boat? I've been using an old 2 stroke 25 hp Mercury which will plane easy enough when I can start the thing. But it's too moody.
Tohsgib posted 07-29-2009 10:51 AM ET (US)
15 will plane it but 25 ill plane more than 1 person. Go with the Honda. I have a 240lb Suzuki 40 on mine...160 is nothin.
mantis posted 07-29-2009 02:26 PM ET (US)
Thanks. Because 160lbs is 35lbs more than I weigh it sounds heavy to me. But what do I know? Not much. I'll look into it.
dg22 posted 07-29-2009 03:07 PM ET (US)

I did notice the Honda 25hp tiller is 160 lbs but the R/C version is 178 lbs. Not sure what setup you have.
mantis posted 07-30-2009 08:36 AM ET (US)
tiller - pull start - but may retrofit w/ elec
themclos posted 07-30-2009 08:40 AM ET (US)
Go for the 25HP.
number9 posted 07-30-2009 09:05 AM ET (US)
Whether you refit or stay with the tiller, go for the PT&T.
Peter posted 07-30-2009 09:36 AM ET (US)
An Evinrude 15 HP 2-stroke will get the 13 Whaler on plane. Don't know whether a 15 HP 4-stroke will. In this case, I would err on the side of getting the Honda 25.
Tom W Clark posted 07-30-2009 09:42 AM ET (US)
Whether a Nissan 15 will plane a 13 depends entirely on who is the boat and how much they weigh. If there's just a kid, a 9.9 will plane a Sport 13.
Having said that, I would go with a 25 HP motor which is a very good match for the 13s. That amount of power will accommodate several adults.
199213 posted 07-30-2009 02:38 PM ET (US)
I'd stick with the 25. I have a '92 Johnson 28SPL 2-stroke on mine and think its a good size. It will do ~30mph with just myself in it on a flat lake.
I've only had two days when I've wished I'd gotten a 40.
I once had a problem getting on a plane with that motor. With five adults, two full 6-gallon gas tanks, and deep cycle battery into 3' rollers and a 10-15kt headwind it just wouldn't plane. After burning 5 gallons of gas and turning around with a tail wind/waves, the return trip took 1/4 the time.
When pulling a rather large person on a tube, I could only get on plane by using one tow eye and circling with the tuber on the inside of the circle.
Tohsgib posted 07-30-2009 02:55 PM ET (US)
The main problem with the 28spl was prop design and choices. Great engine but 1950's lower unit. Newer 25's will conquer many of those problems.

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Author	Topic: How much hp does it take to plane a 13' whaler?
mantis	posted 07-29-2009 09:53 AM ET (US) Sorry if this question has been answered elsewhere. I need a new motor. Am considering new 4 stoke Nissan 15hp @ 120 lbs, but found used '06 4 stroke 25hp Honda @ 155-160lb (I think.) Wonder if: #1. Will 15hp get the 13' whaler to plane? #2. Is 25hp Honda too heavy for the boat? I've been using an old 2 stroke 25 hp Mercury which will plane easy enough when I can start the thing. But it's too moody.
Tohsgib	posted 07-29-2009 10:51 AM ET (US) 15 will plane it but 25 ill plane more than 1 person. Go with the Honda. I have a 240lb Suzuki 40 on mine...160 is nothin.
mantis	posted 07-29-2009 02:26 PM ET (US) Thanks. Because 160lbs is 35lbs more than I weigh it sounds heavy to me. But what do I know? Not much. I'll look into it.
dg22	posted 07-29-2009 03:07 PM ET (US) I did notice the Honda 25hp tiller is 160 lbs but the R/C version is 178 lbs. Not sure what setup you have.
mantis	posted 07-30-2009 08:36 AM ET (US) tiller - pull start - but may retrofit w/ elec
themclos	posted 07-30-2009 08:40 AM ET (US) Go for the 25HP.
number9	posted 07-30-2009 09:05 AM ET (US) Whether you refit or stay with the tiller, go for the PT&T.
Peter	posted 07-30-2009 09:36 AM ET (US) An Evinrude 15 HP 2-stroke will get the 13 Whaler on plane. Don't know whether a 15 HP 4-stroke will. In this case, I would err on the side of getting the Honda 25.
Tom W Clark	posted 07-30-2009 09:42 AM ET (US) Whether a Nissan 15 will plane a 13 depends entirely on who is the boat and how much they weigh. If there's just a kid, a 9.9 will plane a Sport 13. Having said that, I would go with a 25 HP motor which is a very good match for the 13s. That amount of power will accommodate several adults.
199213	posted 07-30-2009 02:38 PM ET (US) I'd stick with the 25. I have a '92 Johnson 28SPL 2-stroke on mine and think its a good size. It will do ~30mph with just myself in it on a flat lake. I've only had two days when I've wished I'd gotten a 40. I once had a problem getting on a plane with that motor. With five adults, two full 6-gallon gas tanks, and deep cycle battery into 3' rollers and a 10-15kt headwind it just wouldn't plane. After burning 5 gallons of gas and turning around with a tail wind/waves, the return trip took 1/4 the time. When pulling a rather large person on a tube, I could only get on plane by using one tow eye and circling with the tuber on the inside of the circle.
Tohsgib	posted 07-30-2009 02:55 PM ET (US) The main problem with the 28spl was prop design and choices. Great engine but 1950's lower unit. Newer 25's will conquer many of those problems.