Zenoah marine to air conversion??
03-23-2010, 04:49 PM
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Zenoah marine to air conversion??
I have a zenoah pum23 marine engine & was toying with the idea of converting it for air use. according to the zenoah manuels, the pum23, g23, and g26 all share the same lower end which means that by replacing front seal on the marine application with the third sealed bearing for air engine, replacing top end & muffler, & mounting prop adapter should be all that's needed to convert this engine to a g26 air and should cost less than half of buying a new g26. Is that all there is to it, or am i overlooking something here? (I have more time than funds on my hands at the moment 
). Also, the carb is a walbro wa 167 & this engine uses the red source coil. Are these items suitable for air use? thanks in advance for taking time to read this.
). Also, the carb is a walbro wa 167 & this engine uses the red source coil. Are these items suitable for air use? thanks in advance for taking time to read this.
03-23-2010, 11:37 PM
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RE: Zenoah marine to air conversion??
ORIGINAL: repirazz
I have a zenoah pum23 marine engine & was toying with the idea of converting it for air use. according to the zenoah manuels, the pum23, g23, and g26 all share the same lower end which means that by replacing front seal on the marine application with the third sealed bearing for air engine, replacing top end & muffler, & mounting prop adapter should be all that's needed to convert this engine to a g26 air and should cost less than half of buying a new g26. Is that all there is to it, or am i overlooking something here? (I have more time than funds on my hands at the moment [img][/img]). Also, the carb is a walbro wa 167 & this engine uses the red source coil. Are these items suitable for air use? thanks in advance for taking time to read this.
I have a zenoah pum23 marine engine & was toying with the idea of converting it for air use. according to the zenoah manuels, the pum23, g23, and g26 all share the same lower end which means that by replacing front seal on the marine application with the third sealed bearing for air engine, replacing top end & muffler, & mounting prop adapter should be all that's needed to convert this engine to a g26 air and should cost less than half of buying a new g26. Is that all there is to it, or am i overlooking something here? (I have more time than funds on my hands at the moment [img][/img]). Also, the carb is a walbro wa 167 & this engine uses the red source coil. Are these items suitable for air use? thanks in advance for taking time to read this.
Cranks, Ignition systems,bearing seals however are all the same
03-24-2010, 12:41 AM
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RE: Zenoah marine to air conversion??
The case used with the red source coil engines might not have the transfer ports as large as the 26 case..If you cut the bottom cylinder extensions off and make sure the piston goes down into the case without interference, it will work...Might take a little enlarging on the case....
03-25-2010, 08:56 PM
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RE: Zenoah marine to air conversion??
Antique-thank you for the input. It appears that the transfer ports areas in the case have already had some 'relieving' done to it. I will contact dave's discount motors see what they have available. I'm liking the 29cc idea, i'm guessing that would be a 36mm bore.
Scott-that's the kind of compatability info I was looking for. thank you. I definately have the g230 (early) case. So i guess the options here are: (A) go with early 23cc air cyl, (B) buy late style case, or (C) do mods as Antique suggested.
Scott-that's the kind of compatability info I was looking for. thank you. I definately have the g230 (early) case. So i guess the options here are: (A) go with early 23cc air cyl, (B) buy late style case, or (C) do mods as Antique suggested.
03-25-2010, 09:10 PM
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RE: Zenoah marine to air conversion??
ORIGINAL: Antique
You can make it a 29cc with a cylinder and piston from Dave's Discount Motors...And less $$..
You can make it a 29cc with a cylinder and piston from Dave's Discount Motors...And less $$..
03-25-2010, 09:23 PM
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RE: Zenoah marine to air conversion??
Hardly worth the effort...The last G231PUH 32mm bore heli engines using that case with the enlarged ports ran just like the 26, I have one here...They have since dropped the 231PUH in favor of the 26....
Must not be much wall thickness on the ports in that green case...
Must not be much wall thickness on the ports in that green case...
