SAKONNET Re-Power with 100-HP OMC - Moderated Discussion Areas

  ContinuousWave
  Whaler
  Moderated Discussion Areas
  ContinuousWave: Whaler Performance
  SAKONNET Re-Power with 100-HP OMC

search | FAQ | profile | register | author help

Author Topic:   SAKONNET Re-Power with 100-HP OMC

perkunas170 posted 06-16-2004 12:31 PM ET (US)
Hi Folks. I'm a long-time lurker (thanks for all of the indispensable info over the last few years!)
I just repowered my 68 Sakonnet with a slightly unusual motor - a 2000 Johnson Commercial 100hp (not FICHT, thing's got 4 carbs). I got it as a new leftover, still in the crate, last week for $5,235. Did I get a deal, as I think?
Anyway, my main question is around one of prop confusion. Dealer wanted me to put on a 15x17 but I insisted on trying a 14.25 x 19 for starters, considering the motor I replaced was turning a 13x19 and seemed pretty good. On the maiden testing run last night, with me 210 lbs and a *large* friend (350+), this boat LEAPT out of the water, and at cruising speed, if you goosed the trottle a little, acted like it wanted to "do a wheelie in 2nd gear" to use a motorcycle analogy. Do I need to go to a 14 x 21 prop? Unfortunatly, I don't have a funtioning tach (hopefully today). Any thoughts?
Joe
JBCornwell posted 06-16-2004 01:10 PM ET (US)
Borrow a tach, Joe.
The only way that I know to select the correct prop for a boat is to run it at WOT and get near the upper end of the operating range. Don't know about your 100C, but I would guess it at 5500rpm.
If you have too little pitch you risk over-revving the engine. If you have too much pitch you will lug the engine.
Good luck. :)
Red sky at night. . .
JB
lerker posted 06-16-2004 01:10 PM ET (US)
whether you need (or can run) a higher pitch prop or not will depend on your WOT rpm. post that data after you get your tach installed.
perkunas170 posted 06-16-2004 01:31 PM ET (US)
I didn't even get close to WOT last night. Do I need to wait until I've finished the 10 hour break in (any break-in advice appreciated too!) before I properly (pun intended) assess this screw?
Joe
Bigshot posted 06-17-2004 10:58 AM ET (US)
Get a tach but I doubt a 21". The commercial should have a V6 gearcase but not sure about newer ones. As far as a deal goes, depends on what that $5200 included. you can buy a new 2004 90hp Johnson all day for about $4500(just motor).
jimh posted 06-20-2004 11:57 PM ET (US)
[Changed TOPIC; was "Thoughts and comments on my recent repower?"]
I want to go outboard shopping with Big'. Next time I buy a new outboard I want Nick making the deal!
Bigshot posted 06-21-2004 10:15 AM ET (US)
My bad....Just checked Ed's & 2005's are up to:
90 HP 20" JOHNSON $4,899. Yamaha is $4,999, and E-tec is $6299. The 2004's were $4499 or $4599 I believe. Ed's has good deals but many here have beaten their prices....they are a good place to start.

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: SAKONNET Re-Power with 100-HP OMC
perkunas170	posted 06-16-2004 12:31 PM ET (US) Hi Folks. I'm a long-time lurker (thanks for all of the indispensable info over the last few years!) I just repowered my 68 Sakonnet with a slightly unusual motor - a 2000 Johnson Commercial 100hp (not FICHT, thing's got 4 carbs). I got it as a new leftover, still in the crate, last week for $5,235. Did I get a deal, as I think? Anyway, my main question is around one of prop confusion. Dealer wanted me to put on a 15x17 but I insisted on trying a 14.25 x 19 for starters, considering the motor I replaced was turning a 13x19 and seemed pretty good. On the maiden testing run last night, with me 210 lbs and a large friend (350+), this boat LEAPT out of the water, and at cruising speed, if you goosed the trottle a little, acted like it wanted to "do a wheelie in 2nd gear" to use a motorcycle analogy. Do I need to go to a 14 x 21 prop? Unfortunatly, I don't have a funtioning tach (hopefully today). Any thoughts? Joe
JBCornwell	posted 06-16-2004 01:10 PM ET (US) Borrow a tach, Joe. The only way that I know to select the correct prop for a boat is to run it at WOT and get near the upper end of the operating range. Don't know about your 100C, but I would guess it at 5500rpm. If you have too little pitch you risk over-revving the engine. If you have too much pitch you will lug the engine. Good luck. :) Red sky at night. . . JB
lerker	posted 06-16-2004 01:10 PM ET (US) whether you need (or can run) a higher pitch prop or not will depend on your WOT rpm. post that data after you get your tach installed.
perkunas170	posted 06-16-2004 01:31 PM ET (US) I didn't even get close to WOT last night. Do I need to wait until I've finished the 10 hour break in (any break-in advice appreciated too!) before I properly (pun intended) assess this screw? Joe
Bigshot	posted 06-17-2004 10:58 AM ET (US) Get a tach but I doubt a 21". The commercial should have a V6 gearcase but not sure about newer ones. As far as a deal goes, depends on what that $5200 included. you can buy a new 2004 90hp Johnson all day for about $4500(just motor).
jimh	posted 06-20-2004 11:57 PM ET (US) [Changed TOPIC; was "Thoughts and comments on my recent repower?"] I want to go outboard shopping with Big'. Next time I buy a new outboard I want Nick making the deal!
Bigshot	posted 06-21-2004 10:15 AM ET (US) My bad....Just checked Ed's & 2005's are up to: 90 HP 20" JOHNSON $4,899. Yamaha is $4,999, and E-tec is $6299. The 2004's were $4499 or $4599 I believe. Ed's has good deals but many here have beaten their prices....they are a good place to start.