Xylene remove old gasoline varnish

[bc.gold 3,399]

Couple of older mowers that sat for years had badly varnished carburettors along with the usual crap.

 

The Xylene did a great job on the old varnish, the next step in cleaning involved submersing the disassembled carburettor in boiling water, freezing the carburettor then back into the hot water, repeated this process three times.

 

After the third hot water treatment no more dirt appeared on the bottom of the pot used.

 

Carburettor reassembled and installed, engine runs perfect.

[Ed Kennell 35,708]

3 hours ago, bc.gold said:

boiling water, freezing

Is this just to create a rapid metel expansion to loosen the dirt?

[bc.gold 3,399]

3 hours ago, Ed Kennell said:

Is this just to create a rapid metal expansion to loosen the dirt?

 

Yes the expansion and contractions then when the water begins to boil oxygen bubbles form on the hot surfaces as they release from the surface some junk is dislodged.

 

This fact is what inspired me, Think of it as having picked all the rocks clean from your pasture or garden then with next years frost new rocks mysteriously appear.

[bc.gold 3,399]

I've discovered how to make new friends, having the only mower in the neighbourhood that runs.

 

After cutting five lawns its time to re-torque the cylinder head bolts.

 

Also parked the mower out of sight.

 

Pat's Briggs boxer is next to do, the fuel tank has a lot of varnish inside I'll give it a shot of Xylene solvent.

[bc.gold 3,399]

The extra strength cleaning vinegar did a much better job with the fuel tank.