big boat little motor
Seaman
- Joined
- May 21, 2009
- Messages
- 54
I finally got my new motor hung on the boat. Conducted the following tests to make sure that I was not going to have any problems:
1. Ran at idle on muffs for 10 minutes to get engine up to operating temp no hot light.
2. Took boat and motor to the ramp and backed in to test in gear since I don't like to run the motors in gear on muffs this test ran for about 15 minutes no hot alarm.
3. Launched and took the boat out for a cruise. after about 5 minutes in a no wake zone and the "hot" alarm came on.
Not knowing where to go with this I immediately killed the motor and trolled back to the launch. Before we pulled out I tried again and again within 5 minutes the hot alarm came on.
We promptly loaded out and assumed it was a valid overheat situation. After getting home I pulled the thermostats and replaced them as well as inspected the poppet valves. The water pump is projecting a solid tell tale. So after isolating the 2 major components of the cooling system i started it again on muffs and again I got the "hot" alarm within 5 minutes. At this point I as able to put my hands on the heads and they were solidly warm but not to a temperature that would require me to remove my hands from the head.
I pulled a 1989 88 spl and replaced it with a 1984 140 bubbleback the harnesses connections seemed to directly connect.
So the question that I am having is this a real overheat or a tack/alarm that is heading south or an incompatible wiring harness?
Thanks
Jason
1. Ran at idle on muffs for 10 minutes to get engine up to operating temp no hot light.
2. Took boat and motor to the ramp and backed in to test in gear since I don't like to run the motors in gear on muffs this test ran for about 15 minutes no hot alarm.
3. Launched and took the boat out for a cruise. after about 5 minutes in a no wake zone and the "hot" alarm came on.
Not knowing where to go with this I immediately killed the motor and trolled back to the launch. Before we pulled out I tried again and again within 5 minutes the hot alarm came on.
We promptly loaded out and assumed it was a valid overheat situation. After getting home I pulled the thermostats and replaced them as well as inspected the poppet valves. The water pump is projecting a solid tell tale. So after isolating the 2 major components of the cooling system i started it again on muffs and again I got the "hot" alarm within 5 minutes. At this point I as able to put my hands on the heads and they were solidly warm but not to a temperature that would require me to remove my hands from the head.
I pulled a 1989 88 spl and replaced it with a 1984 140 bubbleback the harnesses connections seemed to directly connect.
So the question that I am having is this a real overheat or a tack/alarm that is heading south or an incompatible wiring harness?
Thanks
Jason