is a 40 HP Johnson 737 enough for a 16.7" Sport?

  ContinuousWave
  Whaler
  Moderated Discussion Areas
  ContinuousWave: Whaler Performance
  is a 40 HP Johnson 737 enough for a 16.7" Sport?

search | FAQ | profile | register | author help

Author Topic:   is a 40 HP Johnson 737 enough for a 16.7" Sport?

lanti24 posted 08-07-2012 12:09 PM ET (US)
is a 40 HP Johnson 737 enough for a 16.7" Sport?
I've found a vintage 17' Sport (17' barehull with wooden low console) but i'm afraid my engine (1993 Johnson 737 GT, 40 hp ) would be too weak to make this boat plane...
What do you think?
Thank you very much

Tom W Clark posted 08-07-2012 12:22 PM ET (US)
The minimum HP to plane a classic 16' - 7" Whaler satisfactorily is 35 HP so I would think your 40 HP Johnson would be fine.
Top speed should be about 26-27 MPH assuming the hull is not waterlogged and the motor is set up and propped correctly.
lanti24 posted 08-07-2012 01:47 PM ET (US)
Thank you Tom :)
L H G posted 08-07-2012 04:32 PM ET (US)
Loafing along at 25 MPH with an engine screaming at 5500 RPM would not be *MY* idea of fun.
contender posted 08-08-2012 08:43 PM ET (US)
Lanti24: you will be sorry, put at least a 70 hp engine on the 17....Take care
Tom: did not the 16'7" recommendation from the factory was a 40-100 hp...
bloller posted 08-08-2012 08:57 PM ET (US)
40hp is plenty for most uses. Would not be enough if traveling far from the dock or taking all your friends out.
lanti24 posted 08-09-2012 06:33 AM ET (US)
Thank you folks!
Anyway...
I've asked the same question to Boston Whaler directly thru facebook: Here is their kind reply, hope will help you too:
Official Boston Whaler Owner's Club:
Hi Giovanni - The minimum HP for a Vintage 17 is 35 HP. Your 40 HP engine will work, but, it may be a bit of a struggle for the boat to plane with two people. Hope this helps!
Clark Roberts posted 08-09-2012 08:31 AM ET (US)
What is a Johnson 737?
Tom W Clark posted 08-09-2012 10:15 AM ET (US)
A Johnson 737 is a model name used in Italy, not the US.
lanti24 posted 08-09-2012 03:44 PM ET (US)
Hi Clark and Tom...
Sorry i thought it was an international name...
It's the italian common name for a very popular engine in Italy during the 90's.
It's a two stroke three cylinder engine, with a displacement of 747 cubic centimeter.
Here they were sold with 25 hp homologation (this was the limit to cruise without a nautical license) but most of them had the limit removed so they could output 40/50 hp.
Ciao :)

Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.

Author	Topic: is a 40 HP Johnson 737 enough for a 16.7" Sport?
lanti24	posted 08-07-2012 12:09 PM ET (US) is a 40 HP Johnson 737 enough for a 16.7" Sport? I've found a vintage 17' Sport (17' barehull with wooden low console) but i'm afraid my engine (1993 Johnson 737 GT, 40 hp ) would be too weak to make this boat plane... What do you think? Thank you very much
Tom W Clark	posted 08-07-2012 12:22 PM ET (US) The minimum HP to plane a classic 16' - 7" Whaler satisfactorily is 35 HP so I would think your 40 HP Johnson would be fine. Top speed should be about 26-27 MPH assuming the hull is not waterlogged and the motor is set up and propped correctly.
lanti24	posted 08-07-2012 01:47 PM ET (US) Thank you Tom :)
L H G	posted 08-07-2012 04:32 PM ET (US) Loafing along at 25 MPH with an engine screaming at 5500 RPM would not be MY idea of fun.
contender	posted 08-08-2012 08:43 PM ET (US) Lanti24: you will be sorry, put at least a 70 hp engine on the 17....Take care Tom: did not the 16'7" recommendation from the factory was a 40-100 hp...
bloller	posted 08-08-2012 08:57 PM ET (US) 40hp is plenty for most uses. Would not be enough if traveling far from the dock or taking all your friends out.
lanti24	posted 08-09-2012 06:33 AM ET (US) Thank you folks! Anyway... I've asked the same question to Boston Whaler directly thru facebook: Here is their kind reply, hope will help you too: Official Boston Whaler Owner's Club: Hi Giovanni - The minimum HP for a Vintage 17 is 35 HP. Your 40 HP engine will work, but, it may be a bit of a struggle for the boat to plane with two people. Hope this helps!
Clark Roberts	posted 08-09-2012 08:31 AM ET (US) What is a Johnson 737?
Tom W Clark	posted 08-09-2012 10:15 AM ET (US) A Johnson 737 is a model name used in Italy, not the US.
lanti24	posted 08-09-2012 03:44 PM ET (US) Hi Clark and Tom... Sorry i thought it was an international name... It's the italian common name for a very popular engine in Italy during the 90's. It's a two stroke three cylinder engine, with a displacement of 747 cubic centimeter. Here they were sold with 25 hp homologation (this was the limit to cruise without a nautical license) but most of them had the limit removed so they could output 40/50 hp. Ciao :)