Just an FYI for those of you with auxillary outboards. If your cooling water is not flowing, i.e. your outboard is not peeing when it should, check your discharge hose before tearing it down and installing a new water impeller.
I put in a new impeller because it was due and I had the gearcase open for other reasons, but when I fired it up there was no water discharge. Turns out the discharge hose was clogged with some sort of goo. I'm still not sure what it was. I actually had mud from mud wasps in there one year. It is easy to pop off and clean out. I used a wire and my compressor to blow it out. Now it works fine.
Cooling water discharge hose (red arrows):
I put in a new impeller because it was due and I had the gearcase open for other reasons, but when I fired it up there was no water discharge. Turns out the discharge hose was clogged with some sort of goo. I'm still not sure what it was. I actually had mud from mud wasps in there one year. It is easy to pop off and clean out. I used a wire and my compressor to blow it out. Now it works fine.
Cooling water discharge hose (red arrows):
