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Author Topic:   repowering 13 with 25hp johnson

jkh posted 04-26-2004 11:24 AM ET (US)
I am considering purchasing a 1975 25hp Johnson for my 1967 13'whaler. It is 15'' shaft, manual and electric start. I'm not sure of the weight of the motor? Would this motor be a good match for an old whaler. Thanks for any assistance.
JBCornwell posted 04-26-2004 12:48 PM ET (US)
Hi, JKH.
I have had a couple of Sport 13s, and powered them with anything from 20hp to 50hp.
I consider an OMC 25 the very best match to the boat, given about 25-28mph top speed, excellent weight balance, fuel economy, cost and maneuverability.
Lots of folks will recommend maximum rated hp (40hp), but I stand by my experience.
Red sky at night. . .
JB
johnz posted 04-26-2004 02:11 PM ET (US)
I have a 1989 13' with a 1989 Yamaha 25hp. Cruises very comfy 20-24, maxes out at 28. Great power for me, good for two guys, will manage a plane with 3 guys, have not tried 4. Sips gas very slowly!
jkh posted 04-26-2004 03:25 PM ET (US)
Thanks for your replies. Sounds like the 25hp will be powerful enough. I was a little concerned with the age of the motor, but it seems to be in good working order. Many have said these older motors will last a long time - so I may try to purchase it. Thanks
Samars posted 04-27-2004 09:10 AM ET (US)
JKH...

I have a 1967, 13 foot Boston Whaler as well and also have an Evinrude 25 pushing her. My 25 is a 1968 model...recently been checked out at around 19-20mph. She planes well and carries enough (two men, gear, cooler) to still plane out respectably. I believe you'll do fine.
Jarhead posted 04-27-2004 10:09 AM ET (US)
My first Whaler was a '60's era with an older 25hp Johnson. The combination was terrific.
Enjoy :)
jkh posted 04-27-2004 10:34 AM ET (US)
Thanks everyone
BQUICK posted 04-27-2004 11:11 AM ET (US)
Don't forget earplugs.
jkh posted 04-28-2004 11:35 AM ET (US)
Well the motor didn't check out like I had hoped - so I'm am back in the market for a motor. I decided the motor would require to much up-keep. When the owner began to explain all the great work he had done to the motor - I decided I didn't want to have to continue that process. I am going to look for the same size motor, either new or slightly used. Thanks
Oh, by the way I understand why you mentioned earplugs.

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Author	Topic: repowering 13 with 25hp johnson
jkh	posted 04-26-2004 11:24 AM ET (US) I am considering purchasing a 1975 25hp Johnson for my 1967 13'whaler. It is 15'' shaft, manual and electric start. I'm not sure of the weight of the motor? Would this motor be a good match for an old whaler. Thanks for any assistance.
JBCornwell	posted 04-26-2004 12:48 PM ET (US) Hi, JKH. I have had a couple of Sport 13s, and powered them with anything from 20hp to 50hp. I consider an OMC 25 the very best match to the boat, given about 25-28mph top speed, excellent weight balance, fuel economy, cost and maneuverability. Lots of folks will recommend maximum rated hp (40hp), but I stand by my experience. Red sky at night. . . JB
johnz	posted 04-26-2004 02:11 PM ET (US) I have a 1989 13' with a 1989 Yamaha 25hp. Cruises very comfy 20-24, maxes out at 28. Great power for me, good for two guys, will manage a plane with 3 guys, have not tried 4. Sips gas very slowly!
jkh	posted 04-26-2004 03:25 PM ET (US) Thanks for your replies. Sounds like the 25hp will be powerful enough. I was a little concerned with the age of the motor, but it seems to be in good working order. Many have said these older motors will last a long time - so I may try to purchase it. Thanks
Samars	posted 04-27-2004 09:10 AM ET (US) JKH... I have a 1967, 13 foot Boston Whaler as well and also have an Evinrude 25 pushing her. My 25 is a 1968 model...recently been checked out at around 19-20mph. She planes well and carries enough (two men, gear, cooler) to still plane out respectably. I believe you'll do fine.
Jarhead	posted 04-27-2004 10:09 AM ET (US) My first Whaler was a '60's era with an older 25hp Johnson. The combination was terrific. Enjoy :)
jkh	posted 04-27-2004 10:34 AM ET (US) Thanks everyone
BQUICK	posted 04-27-2004 11:11 AM ET (US) Don't forget earplugs.
jkh	posted 04-28-2004 11:35 AM ET (US) Well the motor didn't check out like I had hoped - so I'm am back in the market for a motor. I decided the motor would require to much up-keep. When the owner began to explain all the great work he had done to the motor - I decided I didn't want to have to continue that process. I am going to look for the same size motor, either new or slightly used. Thanks Oh, by the way I understand why you mentioned earplugs.