So, end of season is getting close here in Northern Ohio and now is not the time to start having issues. Went out the other day and overheated. Got back in and replaced a beat up impeller. Started in driveway with hose. All systems go. Went out today, 80 degrees and butter, engine over heated. Should have changed the thermostat, I know. Back home, cannot get the housing off. Any tips? With my luck lately I'll break the housing. Thanks.