Notices

going to try new prop

Old 04-13-2002, 01:15 PM
  #1  
loosecannon22
Guest
 
Posts: n/a
Default going to try new prop

Ok here I go, I have a 22 scarab, whimpy 7.4 with peanut heads and a friend lent me a prop to try out. its a 26 4 blade bravo 1. way too much I think but i am about to go try it for i have nothing better to do today. the boat came with a 25 mirage plus and ran 71 wide open stock no mods. one day someone needed that prop more then I and stole it and buggered the threads on my propshaft doing it, geez if your going to steal something at least be professional about it! anyway i had a 23 mirage and put that on and ran 65 then i changed exhuast to stainless, removed the 4600 rpm rev limiter got a bigger carb and put on a gill flame arrestor. I now go 69 but the engine hits 5000 maybee 5100 and runs out of air due to the heads/cam combo but i have lots of power right up untill she stops spinning. what do you guys think would get me the best for the engine right now? I dont want to put on the merlin heads that are laying in my garage right now and change the cam, I would rather use them for my next project and sell this one soon pretty much stock. It only has 150hrs on it so i dont want to tear it apart. any comments? I will be back soon to tell the results, i am predicting 65.
 
Old 04-13-2002, 03:52 PM
  #2  
GOT MERC?
 
Goodfella's Avatar
 
Join Date: Aug 2001
Location: Boynton Beach FL
Posts: 574
Likes: 0
Received 0 Likes on 0 Posts
Cool

Hey Loose,
It's pretty easy to figure out. First off I hope your speed # are coming from a gps not a water pressure speedo. GPS speedos are dead accurate. If you take 23 which is the pitch the prop is X the RPM which is 5100. You get 117,300 that is how many inches your boat moves foward per 5100 RPM. Not including the slip factor of your setup. I think you best choice in your case would be a lab finished 22 pitch Bravo I 4 blade. The out of the hole performance mid range and top end all will have a positive effect with this prop. Also you are in luck becaues I have a preowned one that I can ship to you in Daytona to try.
Goodfella is offline  
Old 04-13-2002, 09:16 PM
  #3  
Registered
 
Join Date: Feb 2002
Location: Honeoye, NY
Posts: 763
Likes: 0
Received 0 Likes on 0 Posts
Default

The guys at Merc will tell you that if the boat handling was ok with the Mirage then that will be the best prop for your top end. They can make a boat kinda hairy if you are close to "terminal hull velocity", but if you can drive it then get a Mirage, have it labed and go fast. --- Jer
jpclear is offline  
Old 04-13-2002, 09:43 PM
  #4  
Registered
 
Tinkerer's Avatar
 
Join Date: Jan 2002
Location: ALTO, MI
Posts: 4,612
Received 7 Likes on 6 Posts
Cool

If your not having problems with handling or getting on plane than stick with the 3 blade mirage prop it will be 2 mph faster than a 4 blade. If you were spinning a 25 pitch before than I would try it again and have it lab finished. With the lab finish and the other things you have done you should gain agout 3 to 5 mph. GOOD LUCK
Tinkerer is offline  
Old 04-13-2002, 10:24 PM
  #5  
loosecannon22
Guest
 
Posts: n/a
Default

the engine blew its last breath. 70 mph 26 4 blade
i threw a spark plug into the batteries. and I mean into the batteries the end is stuck in the side with acid drippng all over nothing like idleing back to the ramp with people saying, is that boat suppose to sound that bad? i dont know how or why yet but the merlin heads are going on this week. girlfiend just doesnt understand yet, she was working
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Sick Stinger
Velocity
9
02-07-2008 11:39 AM
FlyFast
General Q & A
1
08-06-2004 10:22 AM
boatinbill
General Boating Discussion
6
07-26-2002 09:58 AM
MIKEHTMSR24
General Boating Discussion
3
07-22-2002 03:18 PM
MIKEHTMSR24
General Q & A
0
07-22-2002 01:40 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Quick Reply: going to try new prop


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.