Jeremygavin
Well-Known Member
- Mar 6, 2012
- 2,056
- Boat Info
- 2011 520 Sedan Bridge
2016 Sea Ray 19 SPX OB
2019 Walker Bay Generation 340
- Engines
- Cummins QSM11s
Mercury 150 Fourstroke
Honda 40hp
Thanks for the info.The ZF manual recommends changing the fluid every 500 hours. I changed mine last season at about 550 hours, and it was very clean.