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Onan "B" Series Seasonal Filter Tune Up Kit WITHOUT Oil Filter:
 
Included in this kit you will get a high-capacity fuel filter, two top-quality NGK spark plugs, and a high-quality air filter.
 
This kit will work on Case Ingersoll models 226, 446, 448, 648, some 646 & 6000 series with Onan 'B' or 'BF' engines, 16 and 18 horsepower WITHOUT oil filter option. If your model is included here and you DO have an oil filter, please order our "B" series kit WITH an oil filter. (Kit will work on most brands of  tractors that have 'B' series engines BF B43 B48)
 
OPTION- to add new copper core spark plug wires boot colors may very depedning on supply but they will match each other. For more info on our wires check out the spark plug wire listing. 
 
OPTION- to add DD style carburetor gaskets so you can do a simple clean on your carb as we recomending do this at least once a season, Choose DD11, Or DD13 Carb look at photos. 
 
We recommend doing these services at a minimum yearly or seasonal depending on tractor usage and hours. 
 
This kit includes what you need to do your routine seasonal maintenance tune-ups.  This is what we use in our shop. The spark plug heat range we select here for our kit we have found works best with today's gasoline.  This kit is what you need to make your  Onan "B" run like new and stay that way.
 
NOTE: Measurements on the air filter: Height 3 inches, ID 4 5/8 inches,  OD 6 inches; Measure your air filter dimensions to ensure correct fitment. 
 
OPTION NOTE- To add high quality spark plug wires. Also Acell spark plug wires ahve been out of stock for over a year, but we have found a great replacement of the same quality.
 
SHOP TIP: We recommend always running high octane, premium gas in all Case  Ingersoll machines, and even better if you can get ethanol free.  We have found a noticeable difference in performance and reliability/issues. 
 SPARK PLUG GAP .025 - .028