lazy down low/will stainless help?

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andrew k

Seaman Apprentice
Joined
Feb 14, 2006
Messages
42
i race small outbards. my motor is a 20hp merc. i'v tweaked the reed valves drilled exhaust and upgraded to a 25hp carb. i got great speed top end but its lazy out of the hole. i'm now running a 14.5 aluminum. do you think a stainless will help and not affect my top speed?
 
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Ron G

Commander
Joined
Apr 28, 2005
Messages
2,905
Re: lazy down low/will stainless help?

I think a stainless should help because its not going to flex any but i dont know they'll probably want to hear some figures like your rpms and wot but if its racing it might be different.some very knowledgble guys be here to answer all your questions.and welcome to iboats.
 
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gatorred

Petty Officer 1st Class
Joined
Nov 9, 2005
Messages
318
Re: lazy down low/will stainless help?

you can go ss try up or down 2 in pitch or easy into your gas is the motor bogging from to much fuel from over carbing it, just though it will ack simalar if over proped to, it will plain out but slow if go down in pitch it get's up quicker but less top speed you gain one place lose in other place (tork shift prop) was a prop that shifted so good take off shifted for top speed in test's it worked but there not made any more
 
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walleyehed

Admiral
Joined
Jun 29, 2003
Messages
6,767
Re: lazy down low/will stainless help?

Likely talking a specialty prop here with flat trailing edges aren't we??? Such as a clever??
 
Texasmark

Texasmark

Supreme Mariner
Joined
Dec 20, 2005
Messages
14,557
Re: lazy down low/will stainless help?

Back in the days when I was involved in racing, the little 2 blade was the prop of choice on a Quicksilver racing lower unit.<br /><br />We didn't have a hole shot period. You squeezed the throttle and shot a rooster tail 100' behind you and crawled out on the front deck....while you were trying to hold the throttle closed with one hand the the steering wheel with the other...and tried to get her porposing and finally, the little bugger would catch and away we'd go. <br /><br />Can't say what today's props could do for you but Kenny can.
 
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andrew k

Seaman Apprentice
Joined
Feb 14, 2006
Messages
42
Re: lazy down low/will stainless help?

i've been told a 13 pitch stainless is the same as a14.5 alluminum. meaning if i go with the 13 stainless, i shouldn't loose any speed top end. they tell me that if i got a 14.5 stainless i may not be able to turn it. is this true?<br />atk81
 
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Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: lazy down low/will stainless help?

What Walleyehed is asking is are you looking for a specific type of ss prop like a cleaver?<br /><br />What type of boat do you have?
 
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andrew k

Seaman Apprentice
Joined
Feb 14, 2006
Messages
42
Re: lazy down low/will stainless help?

i have a flAT BOTTOM 14 ft bplywood boat, weighs 100lbs, were can i get a specialty prop?
 
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walleyehed

Admiral
Joined
Jun 29, 2003
Messages
6,767
Re: lazy down low/will stainless help?

Not to Butt in, but I think you are looking for a Ron Hill custom for what you have...
 
b.gagnon

b.gagnon

Master Chief Petty Officer
Joined
Apr 28, 2001
Messages
835
Re: lazy down low/will stainless help?

I don't know your level of experience so I will just assume you have little with modifying outboards. You may have changed the powerband of the motor with the changes that were made. The exhaust on outboards is tuned to make the motor have a balanced power transition. One hole too many or two big and your in trouble! There is a chance that a new prop may not help.
 
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