My Volvo penta outdrive 290 lifts up when reverse gear is selected

SOURCE: Volvo-penta aq271c, trim will go down, but not up.no pwr at relay

First check the switch-- does it have power, then check the solenoid to see if it works-- there are two. One is for down, One is for up. If you get power from the solenoid-- outgoing-- check connections going to pump motor.

SOURCE: I have a 1985 bayliner with a 125hp volvo penta

The over heat could be caused by air being sucked in at the hose conection to the outdrive. This is very common on the 270 drive as it does not have an impeller in it and the water pump located at the motor has to **** the water in. If it sucks air it will air lock and not cool. You can prove this by replacing your internal hose with clear to see if you see air bubbles. You may only see the air when on plane or with the outdrive in a bucket of water not covering the hose bracket (which is out of the water on plane). Check both ends of the external cooling hose and the gasket of the housing at the outdrive attachment.

SOURCE: Trouble shooting an outdrive trim indicator

remove sending unit turn on key switch work sender by hand watch gauge should work evenly very eratic change sender

SOURCE: volvo penta boat manual

What's required to attach the shifter cable at the outdrive?

SOURCE: How do I find where the hydraulic pumppower trim is on a Volvo penta ad31 boat motor

Mounted to the inside transom. Usually on the starboard side.