Indmar Marine Heater Tube – Short | 6.2L | Part #597223 Maintain leak-free heater circuit connections on your Ford 6.2L with this genuine Indmar short heater tube. A precision formed tube that connects the heater circuit on the 6.2L engine — correct OEM shape ensures perfect fitment first time with no modification required. Compatible with: Indmar Ford 6.2L marine engines fitted to Malibu, Moomba, Supra, and Tige boats.