The went to the dealer last week. After a few days of trouble shooting and working with the Indmar specialist at my dealer over the phone, I am no closer to resolving the issue. There is a possibility that pump for the heater is failing and causing enough restriction to inhibit coolant flow. Unfortunately, the dealer had already winterized the boat so we couldn’t bypass the pump and run it up to temp. Will have to try it again next spring.
2020 Moomba Mojo
2008 Mastercraft Prostar 197 40th Anniversary
Owner Ness Lake Watersports
Wakemakers “Exact Fit” Bags + Lead = 4,700 ballast
Audio by Wetsounds, MTX, JL Audio, Clarion
15 X 13.00 ACME prop