northern
Well-Known Member
- Jan 17, 2007
- 3,526
- Boat Info
- 380 Aft Cabin 1989 Charts Timezero radar Furuno
- Engines
- Twin 454 strait shaft
We have twin 454 year 1989 3600 hours. Uses 1/2 Qt every 100 hours Port engine at 1200 RPM temperature fluctuates from o on gauge to 190F when it gets to 190 it drops to 100F. The Starboard engine goes to 160F at 1200 RPM and stays there. At 1600 RPM Port goes to 180 fluctuates to 190 never drops lower than 180. Starboard goes to 160 and stays there constantly. Both engines have 140F thermostats in them. Both changed 300 hours ago.
Any idea what my problem is?
Any idea what my problem is?