The Oil Metering Pump on the front cover. Steals crank case oil and meters tiny amounts into the carb float bowl on early models and directly into the rotor housings after that. The apex seals need to get a slight amount of lube to survive.
Some choose to eliminate the pump in some way and just premix some amount of 2 cycle oil into the fuel.
Or, premix the oil.
You can also open the oil gallery that leads to the OMP and TIG weld a dash 3 or dash 4 AN fitting in the gallery. Plug the gallery at the front iron, and run a hose from the fitting to a bottle on the firewall to hold a 2 cycle oil supply. Richard Sohn used to make an adaptor that bolts on with the stock pump to do this operation, but I think he has stopped production for lack of time.
It is customary in writing to show the body of an acronym after its first use in a paper, using capitals that align with the acronym. The OMP (Oil Metering Pump) is used for....etc.
Lynn E. Hanover
The advantage is that you can run a synthetic oil in the sump and not have the rotor housings gumming up.
In a message dated 3/27/2008 11:14:35 P.M. Eastern Daylight Time,
paulo264@cox.net writes:
Sorry, guys----I'm new to the rotary game and keep trying to decipher some of the abbreviations you use, e.g., OMP refers to...??? Paul