![]() I would try running it on straight alcohol and oil first. especially after the engines sit unused for a long time. 33s popping the cylinders off the crankcases when glow became popular and people started pushing them to try to keep up with the other engines available.Īlso, the other problem is the gasket between the steel cylinder fins and the aluminum crankcase junction. In fact, the final death of the Ohlssons was the problem of the. I've been told that they will withstand up to 5% nitro but I never did it. I think if you stick to 25-33% castor oil you'll be fine. The gas fuel mix for O&R was the typical 3:1 gas to oil but I've had alot of people tell me that 2:1 was better for them? But, gas runs hotter than glow so I always run 3:1 when running glow fuel in my Ohlssons. The 23 was always a popular displacement for O&Rs and 29s made more power so those two were the most popular. As such there were very few 19s made as there was almost no demand for it. Keep in mind that by this time O&R was fighting desperately for market share as there were more powerful engines available. If the head was blue anodized then it would be a 29. The rare 33s only came in purple I believe. If there isn't, then your engine is a 19,23, or 29. Check for any indication of an anodized color to the head. As you said there is no adapter in your head then your engine is a smaller displacement engine. Your plug is a VG-2 which is a glow version of the V-2, 1/4-32 spark plug used in the smaller displacement engines. 60 size Champion plug is a V-1, when everything went to glow, Champion made a VG-1. 60 size O&Rs used a 3/8" THREAD size, NOT bolt size. By the time you've backed the stock needle valve out enough to get the engine to run without being too lean, it probably would have fallen out so, the Perfect needle valve was a popular addition. The stock gasoline needle does not have enough taper to allow adequate flow for Alcohol (glow) fuels. Another indication that your engine was most likely a gas engine and not glow, is the aftermarket Perfect brand needle valve assembly. Checking for a crankshaft flat is not always an indication of this as O&R used up crankshaft stocks until it was depleted. The fact that there is no cover over the timer assembly mounting area means that it was probably not a dedicated glow engine. That would mean your engine is a Factory front rotor. If I recall, a piece of soft lead was included as a plug. Instead, one was instructed to either remove the pipe (If you had the proper tools), or cut the pipe then plug the hole. Because of the way the O&Rs are constructed, it would not be feasible for the home modeler to replace the crankcase so a new crankcase was not included in the conversion kit. In the Conversions, The sideport intake pipe was removed or cut off and plugged. Thanks.įirst off, your engine is NOT a conversion. 60 engines that can be purchased today? Any help that you can provide would be appreciated. Can anyone direct me to a web address where they walk you through the process of operating and maintaining these types of antique engines? What type of fuel does this engine use? Is it a gasoline engine, or a glow fuel engine? If it uses gasoline, what octane should be used, and what is the correct mixture of oil to gas? Should castor oil be used in place of automotive oil? Is there anything that I should be wary of in starting or running this engine? Were these reliable engines, and was the power output comparable to the. I would like to get this engine up and running. #OHLSSON AND RICE CHAINSAW SERIAL NUMBERS#Based on some preliminary research, the serial numbers on the back indicate that it was probably manufactured at some time in the 1950s. The glow or spark plug on the top says "CHAMPION VG 2". I can't tell if anything is missing from it, but I am guessing that it is all there. The engine has good compression, and turns smoothly. I have absolutely no experience with vintage engines, and was wondering if anyone could confirm if this is in fact a. I discovered that this stands for Ohlsson and Rice. I just purchased a box of 11 airplane engines at a garage sale recently, and found this one in the box. ![]()
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