Pete Williams
New Member
- Oct 5, 2022
- 1
- Boat Info
- Regal 2660, 1998
- Engines
- Mercruiser 7.4L MPI
Wondering if anyone can help.
I’ve got a 1998 7.4L MPI/MEFI3 Mercruiser. Last year it was running fine, but was badly corroded and required a rebuild, which was completed recently.
When I tried to start her up, after about 10-15 seconds, I get an alarm. 1 Second on, 3 seconds off. Goes on forever.
The Mercruiser computer has been connected to it and at first was showing alarms from all sensors, then after a while, only showed alarm #14, low coolant temp. Very odd, as it would always be cold at start-up. Have run it up to temp in idle-1,700. Alarm stays on.
I’ve tried a new sensor, and have checked wire resistance is OK.
Any ideas???
I’ve got a 1998 7.4L MPI/MEFI3 Mercruiser. Last year it was running fine, but was badly corroded and required a rebuild, which was completed recently.
When I tried to start her up, after about 10-15 seconds, I get an alarm. 1 Second on, 3 seconds off. Goes on forever.
The Mercruiser computer has been connected to it and at first was showing alarms from all sensors, then after a while, only showed alarm #14, low coolant temp. Very odd, as it would always be cold at start-up. Have run it up to temp in idle-1,700. Alarm stays on.
I’ve tried a new sensor, and have checked wire resistance is OK.
Any ideas???