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Honda Mini 4 Strokes

Old 04-17-2002, 11:32 PM
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Birddog-RCU
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Default Honda Mini 4 Strokes

Has anyone used the Honda 31cc 4 stroke yet? I'm sure there is a weight concern with an engine that carries it's own oil and sump. The numbers I'm seeing say it (after conversion) is in the low to high 70 oz. range. Gotta admit... it would be cool! I saw a video clip on the internet and it sounds great. http://www.auav.net/honda/
Old 04-17-2002, 11:58 PM
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kevin mcgrath
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Default Honda Mini 4 Strokes

Carr Engineering do a conversion,both a do it yourself kit,and a ready to fly I think.As you surmised the problem is weight and I beleive these conversions are used mainly in boats as a result,maybe as an anchor?
Old 04-18-2002, 12:45 AM
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pogo3033
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Default 4 cycle gasser

Hi, I have talked with Bill Carpenter of C&H Ignitions a couple of times and have several of his units. He has converted the Honda 31 and tells me that it's a good "Boat Anchor" however he does sell an ignition setup for it.
Old 04-18-2002, 01:22 AM
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Default Anchors away!

Well... we don't need no stinkin boat anchors. We'll have to keep an eye on them and see where they are in a few years.

Thanks for the feedback...
Old 03-04-2003, 03:45 AM
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drdrain
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Default Honda Mini 4 Strokes

this engine is underpowered. over weight though? well... 3.8 Lbs. is about 8 ozs. heavy. I have a 31cc ryobi with C & H ignition. power to weight is VERY good & it weighs 3 lbs. (with some of my very extensive trimming). there is a 50cc version called the GX50. I'm going to take this one on as a project & boost the compression come hell or high water. that's its' fatal weakness... 7 to 1 compression ratio. I'll keep ya posted
Old 03-04-2003, 03:59 AM
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Default Honda Mini 4 Strokes

Iv'e got one of the Honda's that was converted by someone else. I have never ran the engine. If I recall there supposed to turn a 18" prop? Certainly electronic ignition would put it on a diet. I'll have to weigh mine, I don't recall how heavy it is.

I bought the engine with the thought that I would hang it on a high wing model like a CUB or similar, the Honda maybe a little heavy but these models usually need the weight up front and if nothing else it would fly the model scale "like". I have so many other projects in front of this one, it's way back on my list of thing's to do. Someday...
Old 03-04-2003, 02:16 PM
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edge 3644
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Default Honda Mini 4 Strokes

Hi,

My Honda 31X weights like 4 lbs with rear bracket and shaft
extension plus prop washer and M8 bolt. Runs great, transition is good and sounds fantastic. Prop I use is 18X6 Master Airscrew Classic. I put it to my old 75" Extra-300 for test flights. Nose was heavy like hell, so it stalled on first turn on climbing after take off. After repair of plane I will try it again. In this type of plane Honda won't have any future, but in something like 25% scale Piper J-3 Cub I'm sure it will (Balsa USA kit).
Old 03-06-2003, 03:50 AM
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bdtsr
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Default Honda Mini 4 Strokes

Well for $180 bucks it might be worth looking into. I have a 100" Rearwin Speedster and am contemplating this conversion. I think a 4 stroke would be cool in this plane. Any one else with similar intentions?
Old 03-06-2003, 04:02 PM
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xp8103
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Default Honda Mini 4 Strokes

Someone posted a link somewhere to the new Stihl 4 stroke. It is a gas-oil mix unit rather than a sump oiler. The weight is supposed to be marginally more than a comparable 2 stroke.
Old 03-06-2003, 04:04 PM
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bdtsr
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Default Honda Mini 4 Strokes

I checked that one out, looks good, but how much? Might not be cost effective until it's been out for awhile.
Old 03-06-2003, 04:07 PM
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stomper
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Default Honda Mini 4 Strokes

Here you go>http://www.rcuniverse.com/showthread...176#post750791

Dougg
Old 03-06-2003, 04:57 PM
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bdtsr
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Default Honda Mini 4 Strokes

OK just listened to the honda on carr precision site. WAY COOL! A 4 stroke conversion is in the near future! Now, honda or Ryobi?
Old 01-08-2004, 12:42 AM
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Jitters
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Default RE: Honda Mini 4 Strokes

Has anyone heard anymore on the Stihl 4-mix engine, I checked today and the trimmer is 369.00 and they can't get the engine seperate. I'd still get the motor if someone had some good expieriance with it. thanks
Old 01-15-2004, 10:12 PM
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Dean Wise
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Default RE: Honda Mini 4 Strokes

has anyone tried anything with the Honda 50 GX yet. or heard anything more on the stihl conversion
Old 01-16-2004, 05:11 AM
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ZAGNUT
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Default RE: Honda Mini 4 Strokes

over in the conversion forum rcign (ralph) started a thread for the stihl and posted a few results. looks to be a much better plane engine than the ryobi or honda


dave
Old 08-23-2004, 06:21 PM
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J232
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Default RE: Honda Mini 4 Strokes

nevermind... didnt see the date on the post

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