Originally Posted by BC_Dan
Welcome to the forum! I looked online too. The Polaris diagrams show a corresponding hole in the head, but no mention of what goes in it. It could be that the engine is used for other applications which has something that goes in the hole in the head and the heat plug is to keep the dirt out. Best guess... Now you have me curious!
Yep, I'm still gonna look too! The only reason I knew it was there is I lost a piston last weekend and am fixing it. Thank goodness I know how to do it cause the dealer would want a fortune. The piston failing was "shame on me". The piston and sleeve were shot because of water in the gas. Going from the cold to the heated shop created a ton of condensation and I did NOT add dry gas to it like I should have.