Compression test of '92 Merc 2 stroke 4 cylinder

Folks, I am about to do a compression test on my '92 Merc 2 stroke 4 cylinder. I have still not found a pontoon trailer to pull it out of the water so I can work on the carbs (marinas are booked solid with repair work) - see my other thread on that at http://www.marineengine.com/boat-fo...oke-4-Cylinder-won-t-idle&p=652145#post652145

So, would like to do a compression test (nothing better to do). Have read instructions on compression tester that said to:
Warm engine (can't do that since it won't start but did a cold compression test in 1995 and still have those readings 138-140, can't remember what prep steps I did then).
Remove all spark plugs.
Disconnect fuel supply (and drain fuel out of lines and carbs, I know how to do this).
Disable electronic ignition (don't know how to do that but there is a fuse in the cover of the electronic box).
Screw in compression gauge with appropriate adapter making sure adapter end is short enough to not hit piston.
Hold throttle plate open (I think lifting the fast idle lever all the way will do this).
Crank at least 5 compression strokes to get a reading or until reading stops rising.

So, questions: how to disable electronic ignition??,
hold throttle plate open??,
anything I should do with empty spark plug leads?
Can anyone add to above or answer above 3 questions?
Thanks

Use the kill switch to disable ignition.-----No need to hold throttle plates open on that 2 stroke.----No need to warm up engine.----If kill switch is used the plug wires can hang where they want to be.----Crank till gauge stops rising.

Thanks racerone!!
Kill switch is great idea!
I take it that draining fuel system - disconnect fuel tank line from engine and draining carb bowls should be done?

Thanks racerone!!
Kill switch is great idea!
I take it that draining fuel system (disconnect fuel tank line from engine and draining carb bowls should be done?

No need to worry about fuel in the carburetors at all.

Thanks racereone!!

Found out why compression is so important on a 2 stroke engine from racerone. The amount of air is what has the fuel/lubricant in it; hence, low compression, low air, low lubricant - 2 stroke damage.