HalesMarineServices
Recruit
- Joined
- Nov 15, 2015
- Messages
- 2
I just bought a 08 Proline 32 with a pair of 2008 DF300Z and it has sat for 3 years and has only been run a few times in salt water. These engines have 34-35 hours on them. I just finished putting new water pumps, t stats, poppet valves, new water tubes and grommets, tune ups, oil changes, all filters, new cylinder head temp an exhaust manifold temp sensors. That being said, I am still having the exact same overheat issue it had from when I purchased the boat. I have Suzuki diagnostic software and cable so I can see the temp rising on the monitor. It takes about 2-3 minutes of running at 2000 rpm's to set overheat alarm or about 6-7 minuted at idle or just above idle. When run at 2000 rpm's it sets a gradient alarm. When run at idle it set cyl temp alarm. Temp reaches 210-220 pretty quickly and I am not getting consistent tell tale stream from either engine. I have run descaler mixture through both engines repeatedly with no change. Has anyone ever had this issue? I have been doing marine service for a long time but I am stumped where to look next.
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