I’m not 100% certain but I think that locks the connector so the part of the connector that holds the hose to the pump can’t accidentally come off the fuel pump. If so, it will work without it but it would be far smarter to have it on.
I’m not 100% certain but I think that locks the connector so the part of the connector that holds the hose to the pump can’t accidentally come off the fuel pump. If so, it will work without it but it would be far smarter to have it on.