Water pump change

[zatcho boat]

Hello all. This is my first time on this site so if anyone can offer any help I would much appreciate it. I recently purchased a 50 HP J50TLCRM 1984 Johnson outboard. I am trying to change out the water pump assembly but am having a terrible time removing the lower housing to access it. There are about 6 bolts on the bottom side of the housing that easily come off and then the lower housing seems to want to slide right down but there is something else in there holding it from coming all the way down. I have adjusted the throttle in several different positions and all that does is pull the housing up or let it down. I still can't get it to come off all the way so that I can access the pump housing and impeller. Does anyone know what this last part holding the housing to the engine is and most importantly how I disconnect it or make it so that the housing will drop off? Thanks for any help.

MRF

 

[ezeke]

Re: Water pump change

You need to remove the shift rod retaining screw to released the shift rod.

It is accessed and removed from the port side of the engine, below the intake manifold and carburetors. As you face the engine, the head of the screw will be facing you.

 

[zatcho boat]

Prop Selection

Prop Selection

Does anyone know how I should select a prop for a 1984 J50TLCRM ? I need to replace the existing one and am not sure if I should just take it in and have them match it up or if I should switch pitch to something new. I use the boat mainly for just playing around on the water. No skiing or real heavy use applications. I believe a 3 prop is the way to go from what I've read but am not sure on how to select a pitch.

MRF

 

[ezeke]

Re: Water pump change

The full throttle range for your motor is 4500 to 5500 RPM. You should select a propeller that will allow you to reach the upper limit of the range at WOT with your average load. This will help to prevent lugging the engine and shortening its life.