vwitte

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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

the Wasp

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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

http://www.rcuniverse.com/forum/glow...-overhaul.html

Jim

MikeGreenshields

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

vwitte

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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

the Wasp

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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

vwitte

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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??

warhwk

My Feedback: (3)

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...

vwitte

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how much did you want for it. ?

warhwk

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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.

jaka

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).