Winter and summer slid on generac primepact 50g

[get_r_done]

Anyone know what the summer or winter slide is for or what it does to my generator? Mine started surging and I am about to do a tune up on it and a fuel filter. I am wondering if this slide could be the problem. IT was on winter when it started doing this and we used it two weeks ago in the heat. Also can someone tell me the cross reference part number for the these items .

Spark plug
air filter
oil filter
fuel filter
Any help would be helpful. Thanks

[griffis5]

I just tuned up my NP-50G. I bought the spark plug at wal-mart the oil filter and air filter for Generac. The spark plug is a Champion RC12YC, AC R45S or Fram Autolite 65. That is what's in the owner's manual. I used the Champion.

[get_r_done]

Anyone have a cross ref chart for the tune up parts. Napa cant find half the stuff. And need to get this prob. fixed my Labor day.

[darsben]

Surging is usually caused by dirty carb.
Switch just moves a shutter to bring in air that has been preheated and is a little warmer.