Alarm Problem

[KayKatz...]

Hi, I have a 1999 60hp 2 stroke - C60TLRX. I just rebuilt the carbs and the motor was running fine. I decided to check the timing but I forgot to turn the water back on, so the alarm went off. I let it cool down and tried it again (with the water turned on), but the alarm keeps going off - the motor is getting very hot. I removed the thermostat and tested it in the sink and it opens and closes fine. The water from the tell-tale was not very hot at all, not sure if this matters, but it was coming out as it normally does. I searched for related posts but couldn't find much. Any help would be appreciated.

[pstephens46]

I would drop the lower unit and check the water pump for heat damage.

[KayKatz...]

Thanks for the quick response, I'll try to get that done tomorrow.

[panasonic]

You are going to need a water pump kit.

[99yam40]

More than likely, a housing too
look for signs of melting plastic

[KayKatz...]

Good call guys, parts are on order.

[KayKatz...]

I just installed the waterpump kit and the water coming out of the tell tale was even less than before. After a few minutes, the alarm went off again. I dropped the lower unit again and removed the waterpump housing but the insert cartridge stayed with impeller. I noticed that the cartridge fits loosely in the housing. Is this normal, or did I get a bad kit? or could there be another problem?

[99yam40]

did you replace the housing like I said?

and what happened to the pieces that came off of the impellor?
are they up inside the motor cooling passages?

have you pulled and tested the stat?

[KayKatz...]

Hi, yes it's a new housing. I tested the stat before I removed the lower unit. I blew compressed air - no restrictions at all from the tell tail to the pick up tube in the lower unit.

[99yam40]

something is not allowing proper circulation of the water,
pull the stat again and check in there to see if you see anything behind it .
pieces of impellor may be hard to find in some places.
drop the lower hook up a hose to the tube into power head and flush with stat out.
also try injecting compressed air of and on to see if anything gets flushed out

[KayKatz...]

Thanks 99, I'll give that a shot.

[KayKatz...]

So I've been flushing the motor and just got 2 pieces of the old impeller out of the motor but it's still overheating. Can I safely remove the water inlet covers to see if anything is restricting water getting up to the pump? Or does that screw attach to any internal componetes?

[pstephens46]

You can remove that. Betting the blockage is higher up inside motor.

[pstephens46]

One Yam Master Tech has mentioned running motor with water attached and thermostat and thermostat cover removed. BRIEFLY... to blow crap loose. Maybe a slight rev of motor and then shut down to prevent overheat. Otherwise, things will need to be disassembled and cleaned out.

continued overheat will waste the motor

[KayKatz...]

Thanks for the reply. The weather has been brutal up here in Ontario, so I haven't been able to spend much time on it. I'll post back in a few days.