DF 50 overheating

[Sailorman13]

Need help with a 2006 Suzuki DF 50 HP outboard. The problem is that it won't pump water and overheats.

So far, I've tried the following:
- impeller replaced (and direction verified?
- Thermostat replaced
- all rubber hoses removed and checked for blockages
- engine flushed backwards from the thermostat housing, and it's clear
- pilot hole checked and clear

Not sure what else is left??? Help?

- side note: chapter 7 of the service manual is missing, which is the midunit section, possibly showing a pressure valve I can't find.

[catacom225]

Did it stop pumping water before you changed the impeller or after

[Sailorman13]

Before....And the overheat alarm goes off. I've tried everything to get it working.

[Zuki175]

Maybe the water pump case (#1) has a crack or not sealing correctly. Did you also replace the gaskets (#5) and water pump case seal (#2)?

[Sailorman13]

I did replace the plate and gasket. And I looked at the housing but didn't notice any cracks. No luck there.

[tommybe1]

hope this helps

[Sailorman13]

Thank you everyone for all the help. I think I finally got it fixed. Turns out the engine won't run off of earmuffs. I had to buy a 20 gallon trash can and 6 gallons of vinegar. But I got it running and water is now flowing. I ran it for about an hour without it overheating.

[Sailorman13]

hope this helps

Thank you for this. Very much appreciated

[Moonlighter]

If you want to use muffs, use the small, round, soft ones. They are the only variety that works well with our Suzukis of all horsepower.