2084 overheating
 

Hello. I have a 2084 that runs greatk, but after about 1/2 hour of mowing engine gets really hot. I cleaned the grass screen and it still does it. Also, it backfires sometimes when shutting down. Any suggestions would be greatly appreciated.
Thanks,
Earl

Pull the engine out of the tractor, remove the tins and clean the cooling fins.

reply to 2084 overheating
 

I had a 2084 a few years ago and had a similar issue, the rear seal behind the flywheel started leaking oil and the grass was sucked in there and was caked around the motor. That caused the motor to overheat. Your other issue with it backfiring might be, your coils as they are behind the same cover. I would check there first and replace the coils and seal. I hope this helps.

:beerchug:

This is caused by unburned gas igniting in the hot muffler. I hold my lift in the raise position and turn the key off when I hear the engine straining at idle. Some people open the throttle wide open at the same time as they turn the key off. This is not caused by the "Coils" actually these engines do not have coils, they have magnetos. :beerchug:

It could have a failed intake gasket and is causing to run lean.

Yep it could, My bet is the cooling fins are pack full of crap after 25 years.:biggrin2:

If the fuel solenoid on the carburetor is working properly (sealing), no fuel should be allowed through on shut down to cause the backfire. That is the intent of the solenoid. Either it is not sealing or current is present holding it open.

The main intent was to pass emissions, the side benefit was lessening
run on/backfire.
There is always unused fuel in the system on shutdown.
With high combustion/exhaust system temps, one can experience a backfire.
Also, oxygen can enter the muffler/exhaust system through clamp joints, bad gaskets or degradation of the system.
This will also cause a "pop" or backfire, sometimes causing extensive muffler damage.
Most equipment manufactures will recommend a "normalizing" or cooling off
( idling) of equipment after hard usage, for a few minutes before shutting off.
Just common sense.
And I'm with Sam, debris in the cooling fins do no one good, best to clean.
:beerchug: