what can casue tj150glenc jhonson to go in to slow mode

[gburke769]

1992 jhonson150 someone has bypassed the vro2 but i am not sure if the wires are done right to disable alarms I think they took out the alarm. water psi goes to 25 wot 2 at idle When i drive the boat it runs good for about 1min then goes to slow mode

[ChampioNman]

Remove the airbox cover from the carbs dead center between the carbs is the VRO the end closest to you will have a circuit board with 4 wires on it purple, gray, tan, black. Follow this cable harness to a black connector unplug it. This is for the no oil alarm. On the port side belly pan look for a two wire harness tan and black wires disconnect it that is the Low Oil alarm from your oil tank. The only alarm checking you will have left is the two wires (tan) on the port and starboard heads for temp and the vacuum switch for fuel starvation along side the VRO pump. Check your head temps with an infrared temp gun or thermosticks normal head temp will be in the 145* range. You may have a stuck thermostat.

[SEAHORSE]

Only the temp switches closing put the motor into SLOW mode, the VRO and fuel restriction alarms do not.

Use a temp gun to determine if either cylinder head is overheating and if not, disconnect one temp switch at a time to determine if one is acting up.

A faulty ignition pack, shorted tan wire, or a shorted diode inside the engine wiring harness can also cause the motor to go into slow.

[gburke769]

tHANKS FOR THE ADVISE IT ENDED UP BEING A STUCK TERMOSTAT