Review on Sierra International 18 4306 Powerhead Gasket by Leandro Gray
Check the thermostat cover gasket for your engine
This was just what I needed to rebuild my 1992 15hp engine. Please note the thermostat gasket does not fit my 1992. The O-ring for the thermostat cover must be purchased separately. I was able to find one at the hardware store for 69 cents that was perfect. I'm not sure how long the included thermostat cover gasket will last, so do your own research.
- Meets or exceeds OE quality
- Unreliable
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