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Old Apr 29, 2007, 09:39 PM
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sneasle's Avatar
United States, AL, Huntsville
Joined Sep 2006
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Help!
Need some help identifing a 4S engine.

It is a .91 Four stroke, that is all I know about it. Looks like an OS, Magnum, or TT to me. Might be a saito as well, but I don't think that is a style Saito has used recently.

Any ideas?

[image]http://i2.ebayimg.com/07/i/000/9a/8f/a252_3.JPG[/image]
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Old Apr 29, 2007, 10:06 PM
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ivanc's Avatar
United States, TX, Round Rock
Joined Dec 2004
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Quote:
Originally Posted by sneasle
It is a .91 Four stroke, that is all I know about it. Looks like an OS, Magnum, or TT to me. Might be a saito as well, but I don't think that is a style Saito has used recently.

Any ideas?

Looks a lot like a Thunder Tiger F-91S 4-Stroke

Ivan
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Old Apr 29, 2007, 10:29 PM
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Quote:
Originally Posted by ivanc
Looks a lot like a Thunder Tiger F-91S 4-Stroke

Ivan
Possibly, All three look about the same.. we shall see when it gets here.
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Old Apr 29, 2007, 11:26 PM
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United States, KY, Bardstown
Joined Jun 2005
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looks to me like a TT because my magnum .91 4s has a double silver spacer that butts up against the spinner backplate. that one only has a single and that TT has a single so my best bet is the TT
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Old Apr 30, 2007, 01:50 PM
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United States, TX, Round Rock
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Quote:
Originally Posted by sneasle
Possibly, All three look about the same.. we shall see when it gets here.
No, they don't. Different rocker valve cover, different side plate on the camshaft - see the different bolting pattern on OS and Magnum compared to the TT. Also they use different prop driver.

Here are pics of Magnum and OS.

Ivan
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Old Apr 30, 2007, 09:04 PM
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United States, AL, Huntsville
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Got confirmation that it was a TT. Thanks guys.
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