Gas Fuel Cap Replacement For STIHL 064, 066, 088, MS650, MS660 Chainsaws - UP 639

Losing fuel out of your Stihl chainsaw's gas cap?

If the old one is cracked or won't seal, here's a simple fix.

This is a brand new, unbranded replacement gas fuel cap.

It's designed to fit a bunch of popular Stihl models, including the 064, 066, 088, MS650, and MS660.

It's the UP 639 style, replacing part number 0000 350 0509.

A simple, direct replacement to stop those fuel leaks and keep you sawing.

Make sure your cap is tight before you start cutting.