Glow Engines Discuss RC glow engines

? 2 stroke Magnum 91XL vs 91XLS

Reply
Old 08-12-2017, 01:04 PM
  #1
vwitte
Thread Starter
 
Join Date: Sep 2009
Location: Corona, CA
Posts: 13
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default ? 2 stroke Magnum 91XL vs 91XLS

Hello, I may have an oportunity to buy a recently broken in Magnum 91XL (2 stroke)
i can't find the difference between a XL or XLS. I hear quality was improved in the XLS engine. But I can't find anything specific.
Does anyone have thoughts or insight?
thanks in advance
vwitte is offline  
Reply With Quote
Old 08-12-2017, 08:02 PM
  #2
the Wasp
 
Join Date: Sep 2003
Location: VT
Posts: 2,027
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

you should ask in my link I posted here, I would bet some one will know,,

everything I have read tells me the 91s are strong,, but their Needles are loose, and the case on my 180 4St is rather soft, and you may need to use a regulator as I did need one,, other than that they are usually strong engine

ASP/MAGNUM FS400AR Rebuild/Overhaul

Jim
the Wasp is offline  
Reply With Quote
Old 08-12-2017, 08:42 PM
  #3
MikeGreenshields
 
Join Date: Mar 2005
Location: Orange County, CA
Posts: 382
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

The XLS was a complete redesign. The XLS is stronger, different timing/sizing, carb, etc. And, in fact over time the XLS had several rolling changes to further its performance. That does not mean the XL didn't work or was somehow bad, it's just an older design that is not quite as powerful. And it was a little heavier.
-Mike Greenshields
Now at
mikegoesflying.com
MikeGreenshields is offline  
Reply With Quote
Old 08-13-2017, 07:51 AM
  #4
vwitte
Thread Starter
 
Join Date: Sep 2009
Location: Corona, CA
Posts: 13
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Regarding the Rolling changes I don't suppose there are XLS model numbers or tracking numbers that show what type of Rolling changes??
thought I'd ask.....are there any OS carburetor that fit the Magnum 91xls. Or Magnum 52xls

thanks
vwitte is offline  
Reply With Quote
Old 08-13-2017, 01:34 PM
  #5
the Wasp
 
Join Date: Sep 2003
Location: VT
Posts: 2,027
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

vwitte,, as for the Carb, I don't know if an OS Carb will fit,, but,, I did find a RCU post were by it was told that the OS 160 Twin's Needle Valve Assembly will fit the Magnum 91 and 120 and 160 Twin,, Note that the Assembly comes with the Needle and Seat.

also know that the Magnum's Idle Screw is also loose, so over all it would be a better idea to use an OS Carb IF it fits,


Jim

Last edited by the Wasp; 08-15-2017 at 04:11 PM.
the Wasp is offline  
Reply With Quote
Old 08-13-2017, 01:48 PM
  #6
vwitte
Thread Starter
 
Join Date: Sep 2009
Location: Corona, CA
Posts: 13
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Thanks I was actually considering a Perry Carburator. I've read good reviews on those. They seem very straight forward. I believe I have an old Torpedo .40 with a Perry carburetor. Works , but won't fit....
anyone have experience with Pretty Carbs on a XLS??
vwitte is offline  
Reply With Quote
Old 08-14-2017, 04:59 PM
  #7
warhwk
 
Join Date: Dec 2001
Location: Knoxville, TN
Posts: 663
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

VW,
I think I have a 91XL Carb if you are interested

Edit...I have it! Engine and carb ran great until the glow plug insert and glow plug were ejected with a vengeance. Previous owner thought that JB weld would hold...

Last edited by warhwk; 08-14-2017 at 05:08 PM. Reason: Because I found it...
warhwk is offline  
Reply With Quote
Old 08-14-2017, 05:54 PM
  #8
vwitte
Thread Starter
 
Join Date: Sep 2009
Location: Corona, CA
Posts: 13
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Quote:
Originally Posted by warhwk View Post
VW,
I think I have a 91XL Carb if you are interested

Edit...I have it! Engine and carb ran great until the glow plug insert and glow plug were ejected with a vengeance. Previous owner thought that JB weld would hold...
how much did you want for it. ?
vwitte is offline  
Reply With Quote
Old 08-14-2017, 06:18 PM
  #9
warhwk
 
Join Date: Dec 2001
Location: Knoxville, TN
Posts: 663
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

vwitte,
I don't need any money. I'm glad to help a fellow modeler. Do you want the entire engine, or just the carb and possibly the thrust bearing or any other salvageable parts? Bearings are usable but probably not worth the trouble. I no longer have the muffler. Cover shipping and it's yours. You can text me at 865-363-4426. I cant seem to get notifications on PM's to work.
warhwk is offline  
Reply With Quote
Old 08-15-2017, 07:19 AM
  #10
jaka
 
Join Date: Dec 2001
Location: Upplands Vasby, SWEDEN
Posts: 7,693
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Hi!
Did the engine not have a carb? I assume the carb neck diameter is 13mm, so most 10-15cc engine carbs will fit. A Perry carb is not that good compared to modern carbs (30-40 year designs).
jaka is online now  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

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



All times are GMT -8. The time now is 12:41 PM.