Genuine Onan generator parts (Green Label) are manufactured in keeping with the exact product specifications, which ensure the maximization of the life span of the generator and its power output.
These parts include tune up kits and filters, and may be obtained from certified Cummins Onan RV service and parts dealers, as well as from the Cummins Onan online store.
Spark Plugs - Genuine spark plugs from Cummins Onan are correctly gapped for an RV generator engine, straight from the factory. Spark plugs from other manufacturers may be larger as they may be specifically gapped for automotive engines. The life of the spark plug may be greatly reduced when regapping, if the ground strap is bent and cannot completely cover the electrode.
Air Filters - Genuine air filters from Cummins Onan are manufactured to incorporate special foam pre-cleaner which is specifically used in RV generators.
These come recommended over other air filters that may contain light density filter paper which may result in the hardening and cracking of sealing surfaces with time, thereby allowing the inflow of impure air into the intake system of the engine.
A small amount of dirt will result in the wearing out of cylinders and piston rings with time. Moreover, it may be difficult to find replacement filters for older generator models which come with pre-cleaner.
Oil Filters - RV oil filters from Cummins Onan are designed with valves that permit the bypassing of oil past the oil filter during a cold start, or in the event of the filter becoming plugged.
Onan oil filters come recommended over others that may not have bypass valves, which may result in failed gaskets or engine damage, in the event that debris is trapped, leading to starvation of oil pressure and high oil pressures.
Some oil filters may feature the bypass valves, but may not be able to determine at what PSI the valves will open. If the setting is too high, the paper element in the oil filter may be damaged during a cold start, thereby resulting in a malfunction or even starvation of oil to the engine.
Remember to change the oil in the engine crankcase after its first twenty hours of operation, and thereafter every one hundred to one hundred and fifty hours. For advice about your specific model, be sure to check the Operators's Manual.
You may find that in a short period of thirty days the fuel in your gas generator is breaking down into varnishes and gums which may cause the fuel system to clog up, thereby resulting in surging and hard starting.
In order to prevent this from happening, Onan
recommends that you run your gas generator for 2 hours at a minimum capacity of 50%, at least every 4 weeks, rather than at several short periods of time.
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