The new power head was installed last week and the motor was run with the mechanic driving in the lake. After about 40 Min's of idling about, he took it to 2500 rpm for about 5 Min's, then to 5000 rpm for about the same, then motored back in 1000 rpm intervals back to 1500 rpm where a engine over temp alarm sounded. We checked for the obvious IE; plastic bag, weed around the leg, but nothing there. We ran around for another 2 hours trying to reciprocate the alarm to no avail.The engine did not show signs of being hot. Took back to the workshop and the computer was plugged in and these codes were present. Active codes:
74, 75. Stored Codes: 74, 75, 38, 43. No Oil Run Time was 19 seconds, which never increased when we run it again and withdrew the data again. Crank Sync:No. Maximum engine temp was 98.6 C / 209.5 F. We proceeded to compression test the engine and these are the readings.
1# 130psi, 2# 125psi
3# 125psi 4# 120psi
5# 125psi 5# 125psi
Are these in spec ? We then turned the key on and out of the four led lights, the second one, Crank Position, and the third one, Sensors, where not on. When the engine was started, the third led, Sensor Fault was on.
I have been advised not to use the boat until it gets checked out again on Monday. Any thoughts would be appreciated. I have not been able to use my $65000 boat for 1 month now , and am getting a little frustrated.