Keep some spare fuel filters with you. Change the filter if the available top speed starts to drop. Fill the spin on filter with fuel prior to installing.

Startron is good stuff. The local small engine guy says Startron helps combat the effect of alcohol in gas and its effect on small engines.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.