Cougsfan
Veteran Member
- Joined
- Sep 10, 2008
- Messages
- 1,632
- Location
- Eastern Washington State
- Tractor
- Ferguson TO35, Branson 4720CH
Yes, they use a heat exchanger. Using salt water directly would not be a good thing to do for a cast iron engine block that runs around 3,000 hrs a year. Even the 304 stainless steel used on the deck can corrode.