pappawinner 1 #76 Posted March 22, 2022 Hi guys, I am a new one in this forum. I was looking for info on this engine, and stumbled upon this topic on myoldmachine! I think this is a 22cc P7 engine. I even have the box of this machine still, and because of this I know it was the engine drill. My late father bought this engine at a dump store and took a lot of stuff off it. Everything het took off isn't here anymore... His intention was, that this 22 cc would be used for a big RC model aeroplane. In hose days there were no model engines of this size available. He made an adapter to fit a glow plug in the cylinder head, thats maybe why there is no ignition on it. Unfortunately, between the 60's and today, a lot has happened to the storage of the engine. The carburettor and ignition have been lost over the years. Everything I do have, and that is what you see on the pics, is in pretty good shape. I'm a model airplane builder myself and it seems fantastic to me to get this P7 working for a big scale model. The quality of the heavy crankshaft with counterweight (read; very good flywheel effect) and the construction of the crankcase, cylinder head etc, is in my opinion great! I see in this topic several pictures where I see the carburettor on it which was originally on it. Are there any people that can help me finding such a carb, and possibly the parts that are needed to make the ignition complete? Maybe it would be better if I put a CDI ignition on it for reliability, but that of course would detract from the originality... Thank you very much for your efforts in responding! 1 JUST O&R reacted to this Share this post Link to post Share on other sites
Tom C 5 #77 Posted March 22, 2022 Hi papawinner, your engine looks to be the earlier type, if you look at your top photo look at the lower right side crankcase screw and there is a small v cast recess in the crankcase near Thea screw which is the same as my earlier engines, also I have noticed the two screws that hold the carb manifold are the smaller type as with the early engines I have, so I suggest you have an early type engine? Same as the the one on the right in my pic. I think your engine would have had a diaphragm carb and would have been a P72? Parts are very hard to come by. Good luck with your project. I am in Australia and do have some spare engines that I would sell, but postage overseas is expensive. Cheers Tom 1 pappawinner reacted to this Share this post Link to post Share on other sites
pappawinner 1 #78 Posted March 22, 2022 Tom, great that you respond so quickly, i can see the difference between the former model and the other. It does sound logical that it would have had a diaphragm carb instead of a float carb. I have a vacuum Walbro WYJ type with barrel throttle lying around that might fit. I see that I do miss the intake manifold which is attached to the membrane intake assembly. But I am still very curious about the original diaphragm carb... and oh yes Tom, my first name is Winfried Share this post Link to post Share on other sites
