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Antique Gas Engine Discussion

2HP Detriot Engine

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Old 05-25-2018, 01:35:15 PM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: 2HP Detriot Engine

For my engine, once a day, or even a weekend is OK. If you do not drain, eventually oil will get kicked up by the conrod big end, and oil will then be vaporized. this in turn allows oil to get into the transfer port, and into the combustion chamber, which leads to plug fouling and excessive smoke. When I first got my Detroit running, I accidentally left the oiler open after stopping the engine. At the next start, the engine smoked pretty bad. At first I thought it was just the fact that a lot of oil got onto the piston, but the smoke got worse, and eventually oil fouled the plug. I put in a new plug, and within a few minutes, it too fouled, and when removed was dripping wet with dirty oil. I then realized what was happening, and drained the crankcase. It took a few minutes to burn off all the oil in the cylinder, but once cleared, the engine ran perfectly. On my engine, I set the oiler as follows: Crank pin (con rod big end bearing) 10 drips/minute. On the piston/wrist pin side - 8 drips/minute. I use SAE 30 non-detergent oil, as it is thicker and the engine needs a good body of oil for lubrication. If you want to mix 2 stroke oil into the fuel, you can cut the piston oiler back to 6 drips/a minute, but you still must use it, in order to lube the wrist pin and lower half of the piston. Oil in the fuel will only lube the upper rings and piston top - a job already covered by the oiler. I would not use 2 stroke oil in the oilers. It is meant to be mixed with fuel, and is thinned with mineral spirits in order to allow fast dissolution into the fuel. It is not meant as a primary lubricant for bearings in this application. Putting 2 stroke oil in the oilers is like putting it in your car engine instead of 'regular' oil.
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Old 05-26-2018, 09:32:21 AM
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John Davis John Davis is offline
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Default Re: 2HP Detriot Engine

Todd, I looked up the RPM for the early model 2hp Detroit and the operating speed is 700rpm. The serial #'s were also stamped on the outer diameter of the flywheel. Only problem being is that the serial # can be hard to see on the flywheel cuz it gets filled with paint or sanded away from someone polishing the OD or the flywheel OD is to rusted and pitted to see it.
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Old 05-26-2018, 05:56:08 PM
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Todd Hodges Todd Hodges is offline
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Default Re: 2HP Detriot Engine

Thank you John and Andrew
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