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Old Oct 20, 2012, 08:55 PM
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microairman1's Avatar
United States, IL, Waukegan
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need help with an o.s. Max 46fx.

someone gave me a used o.s max 46fx today and i need to find a muffler,new glow plugs,and what fuel it uses. Also what can i clean it with cause it has some dirt and stuff on it. I dont know much about glow engines the only engine i have are cox .049. Basiclly anything i will need to get it running. any help would be great. Also if anyone knows of a good piper cub arf or kit that uses this engine that would be great. Thanks
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Old Oct 20, 2012, 09:15 PM
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Hemikiller's Avatar
United States, CT, Killingworth
Joined Dec 2005
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A good ARF Piper Cub for that engine...

http://www.horizonhobby.com/products...40-arf-HAN4000

The Great Planes Cub 40 is a good kit...

http://www3.towerhobbies.com/cgi-bin...?&I=LXJ568&P=0

Link to the manual for the 46FX

http://manuals.hobbico.com/osm/50sx-...1fx-manual.pdf


It can use 0% to 15% aircraft glow fuel with 18% oil content. I prefer Wildcat Premium Extra 15%, but others have different fuel preferences and it depends upon what is in your area. I should have a couple spare 46FX mufflers, shoot me a PM. I prefer OS glow plugs, they recommend the #8 or #6 (old A3), depends on the fuel and prop you use.

At the very least, you'll need a glow ignitor, chicken stick and a glow plug wrench, plus some way of getting the fuel into the tank, whether it's a squeeze bulb, hand crank or electric fuel pump. On the higher end, you'll want to get an electric starter and field box etc.
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Old Nov 09, 2012, 07:05 PM
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United States, IL, Waukegan
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would it work with 25 or 30%?
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Old Nov 10, 2012, 01:15 AM
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United States, IA, Muscatine
Joined Oct 2009
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It depends, what kind of fuel. I see most 25 and 30% fuels are for RC cars and will not have enough oil content. It is has a MINIMUM of 18% (more is better) you could surely tune the engine with a cold plug and run the high nitro.
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Old Nov 10, 2012, 01:23 AM
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5 to 10% nitro is all you need. I use Enya #3 glow plugs but any good plug will work. All my fuel uses 10% nitro and 20% lube, mostly castor oil.
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Old Nov 10, 2012, 02:42 AM
use the 4s luke, use the 4s...
scrub monkey's Avatar
Australia, QLD, Booyal
Joined Sep 2012
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I ran 10% nitro, 20% oil in the 46 fx that I had. Ran fine with an amazing idle.
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Old Nov 10, 2012, 09:34 AM
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Minnesota
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Here is a good muffler for the 46FX. This muffler will give you more RPM than the stock muffler, and it is way cheaper.

http://www3.towerhobbies.com/cgi-bin...?&I=LXJB16&P=7

Here is the glow plug that works well with the 46FX.

http://www3.towerhobbies.com/cgi-bin...&I=LXCB27&P=ML

Greg
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Old Nov 10, 2012, 11:34 AM
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Israel, Ramat HaSharon
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It is not in the manual, but OS strongly advises to use fuel that contains a reasonable amount of castor oil (not all-synthetic fuel).

Also, the OS #6-#8 plugs are medium-reach will remain slightly recessed in the head, when fully tightened.

The effect of this is that the plug 'behaves' cooler than it really is.

There are good, inexpensive long-reach plugs available, such as the K&B-1L, which will better fit the engine.
OS offer their own LC4 plug, which fits much better in this engine and works better (according to my experience) than the OS #8.
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Old Nov 10, 2012, 11:48 AM
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Minnesota
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Dar,

You are certainly correct.
I am just relating my experience. I use 20% nitro and this seems to work better with the #8 than it does with the #4.

Greg
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Old Nov 10, 2012, 12:10 PM
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I use Merlin Glow Plugs, I have great luck with the Merlin 2006 in high nitro applications, it is a cold plug.
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Old Nov 10, 2012, 12:30 PM
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United States, IL, Waukegan
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if i dont have a muffler and its got good compression what do you think i could sell it for cause i dont do the larger stuff right now.
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Old Nov 10, 2012, 12:32 PM
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United States, IL, Waukegan
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and thanks for all the help.
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Old Nov 10, 2012, 12:40 PM
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United States, IA, Muscatine
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I would give Brucercengines.com a call and see if he will take it in trade or buy it outright. If you are into smaller engines he has a few, the .16 comes to mind.
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Old Nov 10, 2012, 02:35 PM
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do you possibly have a phone number?cant seem to find one.
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Old Nov 10, 2012, 03:55 PM
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Here ya go, it has contact info through his website. http://www.brucercengines.com/
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