impeller shopping

[MJS]

I just got a 19boat ft byliner cc with a force 120, '90 model. Im going to put a new pump in but don't know much about it. Do I have a 120, or a 120L drive? What's the difference.

 

[pnwboat]

Re: impeller shopping

L-Drive motor is mounted inside the boat and is connected to the lower unit with a shaft and u-joints. This is what it looks like.


The lower unit sticks out the bottom of the boat.



Regular 120HP outboard is mounted on the back of the boat like this.

 

[MJS]

Re: impeller shopping

Ok thanks. Mine is a regular outboard. Can I take the small cover off to get to the thermostat out or do I have to remove all head bolts and take the plate over the head off? Also how can I check the overheat alarm to see if it works?

 

[pnwboat]

Re: impeller shopping

The thermostat cover is held in place with 4 large screws. Sometimes that can get corroded and pretty stubborn to get out. No need to take out the head bolts or remove the head cover.

To test the over-heat sensor itself, you can remove it from the head and heat it up with a heat gun, or maybe a blow drier. I'm guessing that the sensor is set to short at about 180?. Check it with a meter between the wire and sensor case. When it's cold it should read open. When it's heated up, it should read shorted.

To test the over heat buzzer, turn you ignition key to the "ON" position and ground out the wire on the terminal block that the sensor goes to. The buzzer should come on.