Jmac572
Active Member
- Dec 20, 2016
- 212
- Boat Info
- 2004 Sea Ray 390 Sundancer "Freedom"
- Engines
- Twin Mercury 8.1
Hi all, looking for assistance with a MerCruiser 8.1 horizon, it’s a new to me boat… it seems to run pretty well overall but it has a hard cold start, and will not get up to temp at idle, it only gets up to about 140°… it will reach 165° while underway and holds that temp solid. Also while underway I can see a decent amount of white steam or white smoke in the exhaust of just that motor, and I get a sweet coolant smell in the engine bay. It doesn’t seem to be losing a large amount of coolant as the reservoir doesn’t seem to be emptying a noticeable amount. Any ideas? The motor is a new long block approximately 1 year ago.