- Jul 10, 2020
- 162
- Boat Info
- 1981 310 Vanguard Express
- Engines
- Twin Mercruiser 6.2 MPI Horizon FWC inboards
I'm idly looking at preventively swapping out the heat exchangers on my two Merc MX MPI Horizon 6.2 inboards. Mercruiser OEM part is $2,100 each; I came across www.mrcool.us which offers a drop-in replacement for $850. Normally I'm OEM all the way, but that is a staggering price difference. Has anyone used any of Mr Cool's products? I'm a little skeptical. A lot. A heat exchanger looks like a tricky thing to make.