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ContinuousWave: Whaler Performance
More prop help needed
|Author||Topic: More prop help needed|
posted 07-21-2003 01:52 PM ET (US)
I need some propeller help. I have a new 2002 Suzuki DF 70 on the way. My Montaulk will be splitting time between 4000 to 7000 feet above sea level and at sea level. Any suggestions as to which two props I should purchase would be appreciated. Money is a bit of a concern for me, as I need to purchase controls, cables etc.
posted 07-21-2003 06:43 PM ET (US)
If you had a carbed engine, it would make a big difference, but your new engine is DFI fuel injected & really wont be that far off.
If you do in fact need 2 different props, i'd say 2" of pitch less for the high country.
posted 07-22-2003 01:48 AM ET (US)
Thank you for the advise Sal.
posted 07-22-2003 11:32 AM ET (US)
17" should do for you in both altitudes due to the EFI like Sal said.
posted 07-22-2003 12:36 PM ET (US)
I love this forum too. I’m always learning something new. Over in the Meta Forum I learned how to search by using F1. I remembered that you had done some GPS testing between 14x17 and 13x19 props on your Suzuki 70 four stroke powered Montauk and found it here:
You mentioned that “A 18-inch would probably be ideal.” What prop are you running now, and specifically what prop would you recommend.
I understand that JB has a Suzuki 70 four stroke also. JB if you are out there reading your input would be helpful.
P.S. Bigshot I have some diesel piston return springs for you, if your muffler bearings are getting lonely: )
posted 07-22-2003 01:01 PM ET (US)
I am running an OMC SST 13.3/8 x17" double cupped and It is OK. Great holeshot and great with a load but I usually run solo or with just another person so she can hit the redline of 5800 on most days. The 13x19 is too big. I swapped another SST 17" without as much cup to JB for his 18" that was too much for him with his new heavier load he is carrying. I will post results. These will be slighlty different because I am now running a 1986 Newtauk which is heavier by about 70lbs but no bottom paint like I had on the Montauk.
posted 07-22-2003 06:56 PM ET (US)
I Just ordered a Suzuki Stainless 13 1/4 x 18. I'll let you guys know how it does in a few weeks.
Bigshot thanks for the help.
posted 07-23-2003 09:34 AM ET (US)
I feel for you Nevada.
Thanks to many suggestions by those on this forum, I have a Suzuki DF70 with a CMC 4" manual jackplate on a 1971 nauset. It's a sweet engine, however it came from the dealer with a 14X19 aluminum prop. We've put the 20 hours on her and trimmed up with 2 people in the boat we are only seeing 5100 on the tach, no GPS yet so no speeds available. Obviously we've got the wrong prop, but which is the right one?
From bigshot and others postings (and in the reference section) it looked like the 14X18 stainless would be the way to go. Now, I'm seeing references to 13 3/8X17 cupped stainless props. I'm not looking for a perfect set-up but rather a good all around one. What do the guru's now reccomend, and what performance are you guys getting with your DF70's?
posted 07-23-2003 12:44 PM ET (US)
14"diameter should not be used on a small whaler....PERIOD. Run either a double cupped 13 3/8 x17 or 13 1/4 x18. I tried a 13x19 aluminum and she would do about 5400+ but drop to 5k with 3 people....too big.
posted 07-23-2003 01:22 PM ET (US)
What are/were you getting for a top speed at WOT?
posted 07-23-2003 01:46 PM ET (US)
With the 17" about 38mph. With the 19" alum almost 39.5 with a jackplate. 2 people and full tank of gas.
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