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I am about to begin an engine rebuild and beginning to doubt the "identity" of my intended victim. The engine is marked 8HV-001475 and I was told it was from a FX-Nytro somewhere in the 2007-2011 range. The head-scratch moment came when I removed the casing bolts. The inboard 4 bolts were...

I finally got my gyroplane back in the air (it was indeed a head gasket), but the power just isn't where it should be and compression tests lead me to doubt the rings. Short term, I'll looking for another engine or long block for a 2008-2011 FX Nytro. I would consider a used engine with less...

Me again...that Yamaha-powered gyroplane guy. I'm having a bit of an overheating problem. My implementation is setup the same as several other gyroplanes we have that operate without issue, so I am confident of the plumbing. In the recent past, I have replaced the water pump (cracked...

I've posted questions before and this forum has been very helpful. We build gyroplanes using Yamaha sled engines. Usually the FX Nytro and RS Nytro 3 cylinder engines. They work VERY well in aircraft. This is a question regarding a 3 cylinder carburetor model that -probably- came from an RS...

I've learned a lot from this forum, as I have lurked a while. I fly gyroplanes and own a machine powered by a Yamaha Nytro 2009 FX-?? that had a problem the other day. It had an overheat issue...but then it got wierd: * I left it to cool down after landing, and it was running well. I started...