Go Back  RCU Forums > RC Boats > Speed - RC Nitro Boats
Reload this Page >

os .90 marine engine cooling questions

Notices
Speed - RC Nitro Boats For all your rc nitro fuel burning boating needs.

os .90 marine engine cooling questions

Old 08-28-2014, 10:42 PM
  #1  
madmax421
Junior Member
Thread Starter
 
Join Date: Aug 2014
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default os .90 marine engine cooling questions

So i picked up a pristine prather piranha with an os .90 marine engine. I saw this as a huge score , and am readying it for the lake house this weekend. My question about the motor is, the 90 has a double cooling jacket. I dont feel the flow from the rudder pick up is enough water volume for this engine. I am adding a second water pick up and this one is a larger diameter. Should i feed the head or the sleeve/casing jacket the higher volume water line?
Old 08-30-2014, 06:21 PM
  #2  
Ron Olson
My Feedback: (1)
 
Ron Olson's Avatar
 
Join Date: May 2002
Location: Kalamazoo, MI
Posts: 18,664
Likes: 0
Received 14 Likes on 12 Posts
Default

You'll find out soon enough why you scored the OS .90 so cheap as you're going to spend a lot of money on fuel! The good thing is that they run well on low percentage nitro, 40% max.
Where to add the 2nd line hook-up is a good question. Myself, I'd run it to the sleeve but you may prefer it the other way around.
Old 09-01-2014, 07:28 PM
  #3  
madmax421
Junior Member
Thread Starter
 
Join Date: Aug 2014
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default

I ended up running the higher volume water line to the head. Higher temps,more water.
Thanks
Old 09-02-2014, 12:48 PM
  #4  
Hydro Junkie
 
Hydro Junkie's Avatar
 
Join Date: Nov 2004
Location: Marysville, WA
Posts: 9,410
Likes: 0
Received 60 Likes on 57 Posts
Default

Maybe, maybe not. Overcooling can adversely affect how the motor runs as much as overheating can. You might want to consider putting the larger line on the exhaust instead

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.