tonyells

My Quadmaster runs great on level ground and downhill. The other day we were going up a slight upgrade and it backfired and lost power going uphill. My neighbor says it needs a new spark plug. thoughts? I bought a new spark plug, however, I cant find where the spark plug is. Obviously Im not a mechanic! I looked everywhere without taking parts off. Can someone please tell me where the spark plug is? Very much appreciated!