No YS engines were produced as Gasoline with ignition. Perhaps someone converted it. There is a real problem with this in that Gasoline will destroy all the silicone parts within the engine. This is not such big deal on the O-rings. As you can find a replacement o-ring that will hold up gasoline as opposed to the Silicone for Alky based fuels. The big problem especially with the old YS engines is the regulator has a silicone diaphragm, and plunger that can't be easily replaced so it would have to be specially made one of a kind part. And I don't even know what material you could make it out of to make it work properly.

There is a possibility that the engine was setup to run on Alcohol with ignition. This does work but I don't know any of the details on it. The early 90's TOC models ran engines that were like this...but they were not YS engines they were other brands like the Tartan's and so on.

There is no reason on an engine of this size to gain the benefits of an ignition system on Alcohol. I just don't see it working at all much less working well. However there are smarter people out there than me.

If you want to run it as a YS engine I would say this engine defiantly needs to go back to YS Parts and Service and will likely need many parts and pieces. I don't think you are going to be able to stick a OS #F in it and run it and have it work. Too many mods have occurred if it truly is on ignition with a spark plug and not a remote or on-board glow driver.

Sounds like someone experimented for some odd reason and then dumped the engine on you. It still amazes me some of the ideas people come up with in this sport. On a YS 120 there was not much to gain if this engine was really an attempt to convert to ignition on Alky or Gasoline.

Richard at YS can tell you if its worth your time to restore or not. I would say it will likely need some parts but unlikely its just a big paper weight. Richard has the parts and knows what needs to happen and what things look like. If things were modified then he can tell right away. For you to throw parts at it it will likely be very expensive.



Troy Newman
Team YS