2000 F50 TLRY Impeller questions

[Rescue31]

I recently purchased this motor and I replaced the impeller, changed the engine and lower unit oil, and replaced the fuel filter. When I pulled the lower unit off to replace the impeller, I found the plastic nipple that hooks to a hose forward of the impeller is snapped off flush. My questions are: 1. What is this nipple/hose set up for? 2. The hose with the other half of the broken nipple was outside the motor so I was wondering how it is routed in the lower unit? 3. I have another boat with a I/O Mercruiser on it. When I change the impeller on it, I have to place it in forward gear. I couldn't find anything online to suggest that I had to do the same with my Yamaha so I didn't, but now that I have re-installed it, it doesn't seem like it's engaging correctly. Turning the prop by hand it feels as though it is only partly engaging. I appreciate any help you may be able to provide.

[TownsendsFJR1300]

Are you talking about part #19;

2000 F50TLRY Yamaha Outboard LOWER CASING DRIVE 1 F50TLRY Diagram and Parts



That part is for the speedometer/ pitot tube at the VERY FRONT EDGE of the lower unit. Water pressure (while underway) enters the pitot tube and the water pressure/air pushes thru that fitting and later hoses up to the speedometer.

Some engines, that piece simply links the LU to the mid section. Some models have the hose route (with a connector)just above wheere the LU and mid section meet. The hose (if visable down there is black, not reinforced, about 1/4 ID). If properly installed, you'll find that hose exiting the powerhead and would eventually run up to the speedometer..

Re the shifter placement, MOST, you leave it in neutral at the helm and don't mess with it at the LU.

[Rescue31]

Thank you for your help Scott. I replaced the nipple and put a small piece of hose on it with a plug in it because my boat doesn't have a speedometer.

[TownsendsFJR1300]

Your very welcome..


BTW, unless you flush that pitot tube fairly often, it tends to clog up with salt and not work anyway (one less headache).