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ultralight zenoah G25B-1 engine

Posted: Thu Nov 07, 2013 9:29 am
by dick2256
has anyone tried one of these for a mini airboat?
20hp
6500RPM
2.25:1 ratio
any idea what size mini would work with that?

Re: ultralight zenoah G25B-1 engine

Posted: Thu Nov 07, 2013 10:26 am
by Olf Art
They're great little engines. The two I have are rated at 22 hp., and with a different pipe and carb they'll make almost 28.
They weigh about half what a Briggs or Kohler of the same power weighs, and they start and run great. On a real light hull
one would be a great choice for a mini. With the 2.5:1 re-drive I've seen one turn a 62X24 prop.

Re: ultralight zenoah G25B-1 engine

Posted: Thu Nov 07, 2013 12:45 pm
by dick2256
Olf Art wrote:They're great little engines. The two I have are rated at 22 hp., and with a different pipe and carb they'll make almost 28.
They weigh about half what a Briggs or Kohler of the same power weighs, and they start and run great. On a real light hull
one would be a great choice for a mini. With the 2.5:1 re-drive I've seen one turn a 62X24 prop.

the carburetor on this one isn't very good would a mikuni VM 32 off of a snowmobile work? I have one of those thatm has been rebuilt.my engine is rated at 22hp also
Dick

Re: ultralight zenoah G25B-1 engine

Posted: Mon Feb 29, 2016 12:17 am
by Logger
I have two zenoah g 50 motors I'm going to use one on my airplane and the other on my airboat. Anyone using the g50?

Re: ultralight zenoah G25B-1 engine

Posted: Mon Feb 29, 2016 2:22 am
by Olf Art
If anyone wants one of these amazing little 250cc. two stroke engines, I have two that I'll sell at a real fair price. One has approx. 40 min. break-in run time .... it's on an engine stand fitted with a perfect prop, hub, and crush plate. The other is new, in the box and never started. Also included is a brand new 2.5:1 belt reduction drive and a factory repair manual. No tire kickers please, but if you're interested send me a PM. I wanted to build a mini or two with them, which they'd be perfect for, but I'm beginning to think my days of building much of anything are getting shorter. :)

Olf

Re: ultralight zenoah G25B-1 engine

Posted: Wed Jun 28, 2017 10:05 pm
by Arms32x
Still available? I'll buy it. Local pickup cash. Using for a mini.

Re: ultralight zenoah G25B-1 engine

Posted: Thu Jun 29, 2017 4:15 am
by kwanjangnihm
Arms32x
Olf Art is deceased. Not sure if someone in the airboat community purchased these motors.
Good luck in your search.

Re: ultralight zenoah G25B-1 engine

Posted: Sat Jul 01, 2017 9:26 pm
by Arms32x
Does anyone have his contact information, or family contact info so I can find out if they'd like to sell the engine if still available?

Re: ultralight zenoah G25B-1 engine

Posted: Sun Jul 02, 2017 5:56 am
by blackpowderscout
I just saw this. I have the 2 that OlfArt left my mom.

PM me and we can talk.

Re: ultralight zenoah G25B-1 engine

Posted: Wed Jul 19, 2017 10:14 pm
by Aeronut326
Hi I'm in Australia and would be really interested in purchasing the two Zenoah motors,please get back to me.

Re: ultralight zenoah G25B-1 engine

Posted: Thu Jul 20, 2017 5:17 am
by blackpowderscout
They are gone.

Re: ultralight zenoah G25B-1 engine

Posted: Mon Jul 31, 2017 8:22 am
by dick2256
I have the same kind of engine but it has no carburetor
can you tell me the carb type and the part number?
dick2256