1995 Dauntless 13: Re-power with 30-HP Jet - Moderated Discussion Areas

  ContinuousWave
  Whaler
  Moderated Discussion Areas
  ContinuousWave: Whaler Performance
  1995 Dauntless 13: Re-power with 30-HP Jet

search | FAQ | profile | register | author help

Author Topic:   1995 Dauntless 13: Re-power with 30-HP Jet

andyh posted 06-05-2006 12:12 AM ET (US)
I have a Evinrude 40-HP two-stroke right now on our Dauntless 13 and the wife hates it; too stinky and loud.
I'm planing on re-powering, and considering a Yamaha four-stroke F40 40-HP or the F40 jet drive (30-HP)
The boat is used 90% of the time to ferry us over to a barrier island to use the beach. We are limited by the tide right now with the prop motor, so I think the jet would work well. We have to cross about 1/4-mile of oyster beds and at low tide there is about 12-inches of water.
Any thoughts on how a 30-HP jet would push the boat with two people?
Florida15 posted 06-05-2006 09:04 AM ET (US)
The Dauntless is a heavy boat compared to a classic of the same size. A 30 hp prop engine on a 13' classic is marginal so I would think that a 30 hp on a Dauntless would be sluggish, especially if it's a jet.
What kind of performance do you get with the Evinrude 40 ?
Well, you won't get as good with a 30 hp jet.
Seems like most of the Dauntless 13's that I've seen had 50s on them. I had a Dauntless 15 and it had a 70.
andyh posted 06-05-2006 09:33 AM ET (US)
The Evinrude is pretty peppy. I'm not looking for a real high top speed. If I could go 25mph I'd be happy.
The 95 Dauntless 13 is rated at 50hp max and 25 hp min. I'm worried the 30hp jet might be too close to the min. side and not plane well.
where2 posted 06-05-2006 10:23 PM ET (US)
If there are sea grasses on the oyster beds, you will probably NOT appreciate one of the joys of jet ownership. Unplugging the intake grate... Get the F40 with power trim and tilt (and a propeller).
If you read the owners manual on the Jet, you may find that it is not intended to be operated in extremely shallow water because ingesting sand, pebbles, and shells into the jet pump is NOT good for the clearances on the impeller.
andyh posted 06-05-2006 11:42 PM ET (US)
I spoke with two guys from Boston Whaler today. Both felt that with the 30hp jet the boat would be very underpowered. Both also stated the Dauntless 13 could handle a 250lb 50hp motor on the high end. I'm going to go with the Yamaha 40. The 50 is out of my budget.

Florida15 posted 06-06-2006 09:59 AM ET (US)
Andy, I think you made the right choice. I assume you are getting a 4 stroke since your wife was complaining about the other 2 stroke ?
andyh posted 06-06-2006 02:15 PM ET (US)
Yes, going with the Yamaha F40 4 stroke.
Thanks, Andy

andygere posted 06-06-2006 05:25 PM ET (US)
If you need to run shallow, why not consider a hydraulic jack plate. If you do, make sure that you get a water pressure gauge so you can be sure you are getting enough cooling water. Poke around on the web and you will find some skinny water fishing websites where folks have this down to a science.
PeteB88 posted 06-14-2006 02:20 PM ET (US)
Used to be rule of thumb you lose 30% of rated HP with jet pump on an outboard. I was freaked when I moved back here and found people putting jet pumps on 25s and then use them in rivers. Granted, not west coast rivers but still no sense to me.
Outboard jets have their usage but plenty of reserve HP is critical in my experience "just in case"especially in moving water. As regards open water, still significant limitations with jets. There are several manufacturers of reasonable prop guards we used to use out west. WE got them from Bruce Bell owner of Clackacraft actually a pretty good one that clamped to cav plate with a doelfin like thing incorporated in the design. I think Lefty Kreh used a different design for his east coast boats - seemed like rods sort of stuck out to keep prop off the rocks that were welded to a bracket clamped to motor or cav plate.
make a good decision.

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: 1995 Dauntless 13: Re-power with 30-HP Jet
andyh	posted 06-05-2006 12:12 AM ET (US) I have a Evinrude 40-HP two-stroke right now on our Dauntless 13 and the wife hates it; too stinky and loud. I'm planing on re-powering, and considering a Yamaha four-stroke F40 40-HP or the F40 jet drive (30-HP) The boat is used 90% of the time to ferry us over to a barrier island to use the beach. We are limited by the tide right now with the prop motor, so I think the jet would work well. We have to cross about 1/4-mile of oyster beds and at low tide there is about 12-inches of water. Any thoughts on how a 30-HP jet would push the boat with two people?
Florida15	posted 06-05-2006 09:04 AM ET (US) The Dauntless is a heavy boat compared to a classic of the same size. A 30 hp prop engine on a 13' classic is marginal so I would think that a 30 hp on a Dauntless would be sluggish, especially if it's a jet. What kind of performance do you get with the Evinrude 40 ? Well, you won't get as good with a 30 hp jet. Seems like most of the Dauntless 13's that I've seen had 50s on them. I had a Dauntless 15 and it had a 70.
andyh	posted 06-05-2006 09:33 AM ET (US) The Evinrude is pretty peppy. I'm not looking for a real high top speed. If I could go 25mph I'd be happy. The 95 Dauntless 13 is rated at 50hp max and 25 hp min. I'm worried the 30hp jet might be too close to the min. side and not plane well.
where2	posted 06-05-2006 10:23 PM ET (US) If there are sea grasses on the oyster beds, you will probably NOT appreciate one of the joys of jet ownership. Unplugging the intake grate... Get the F40 with power trim and tilt (and a propeller). If you read the owners manual on the Jet, you may find that it is not intended to be operated in extremely shallow water because ingesting sand, pebbles, and shells into the jet pump is NOT good for the clearances on the impeller.
andyh	posted 06-05-2006 11:42 PM ET (US) I spoke with two guys from Boston Whaler today. Both felt that with the 30hp jet the boat would be very underpowered. Both also stated the Dauntless 13 could handle a 250lb 50hp motor on the high end. I'm going to go with the Yamaha 40. The 50 is out of my budget.
Florida15	posted 06-06-2006 09:59 AM ET (US) Andy, I think you made the right choice. I assume you are getting a 4 stroke since your wife was complaining about the other 2 stroke ?
andyh	posted 06-06-2006 02:15 PM ET (US) Yes, going with the Yamaha F40 4 stroke. Thanks, Andy
andygere	posted 06-06-2006 05:25 PM ET (US) If you need to run shallow, why not consider a hydraulic jack plate. If you do, make sure that you get a water pressure gauge so you can be sure you are getting enough cooling water. Poke around on the web and you will find some skinny water fishing websites where folks have this down to a science.
PeteB88	posted 06-14-2006 02:20 PM ET (US) Used to be rule of thumb you lose 30% of rated HP with jet pump on an outboard. I was freaked when I moved back here and found people putting jet pumps on 25s and then use them in rivers. Granted, not west coast rivers but still no sense to me. Outboard jets have their usage but plenty of reserve HP is critical in my experience "just in case"especially in moving water. As regards open water, still significant limitations with jets. There are several manufacturers of reasonable prop guards we used to use out west. WE got them from Bruce Bell owner of Clackacraft actually a pretty good one that clamped to cav plate with a doelfin like thing incorporated in the design. I think Lefty Kreh used a different design for his east coast boats - seemed like rods sort of stuck out to keep prop off the rocks that were welded to a bracket clamped to motor or cav plate. make a good decision.