Add up the numer of cylinders you have in all your:
trucks
cars
motorcycles
ATVs
tractors
lawn mowers
weed eaters
chainsaws
power generators
lawn tools
etc...

basically anything you have that has an internal combustion motor.
(If you happen to own a car with a rotary engine, count each rotor as one cylinder.)
We have at our house;
motors-------------------cylinders
2 Chevy trucks------------16
1 Bonnie---------------------6
1 Duster---------------------6
1 Voyager-------------------6
1 Bonnie motor,
(non-working)--------------6
1 Kubota tratctor-----------3
1 Craftsman tractor,
(non-working)--------------2
3 Weed-Eaters,
(1 non-working)-----------3
2 chainsaws---------------2
1 snow blower------------2
1 yard vac/chipper,
(mounts on tractor)--------2
1 outboard motor-----------1
1 portable generator-------2
1 portable water-pump----2
1 tiller------------------------2
all for a grand total of->55 cylinders

beat that...

does other vehicles in the household count?

Whew! I'm glad I'm not that much of one. I may live in the south but I've got yankee blood running through these veins.

Interesting. I was born of a true Texan in Texas, and I only have a total of 7 cylinders. What a disgrace to the family tradition I am!!

ANYTHING with an internal combustion motor, that sits on the property you live on...
Vehicles, lawn mowers, RC cars, those damn weed eater- powered scooters, portable generators, gas-powered compressors...
whatever, as long as it has engine.

(BTW, the compressor cylinders on an air compressor do NOT count, only the drive cylinders.)

And come on people, let'* see some numbers!
TWM, you need to buy more stuff..... :P unless you live in an apartment?

I have either 16 or 18 total.

Heheh, nope. We live in a 2 bedroom house. Just don't need it, I guess. And after next weekend, I'll be down to 6 cylinders, won't need the lawn mower anymore. Although, before I got married and had a kid, I had...let'* see...26 cylinders

'82 Caprice Classic - 8 (with a 350, baby!)
'86 Fiero - 4
'79 Toyota Pickup - 4
'72 Yamaha 650 XS twin - 2
'89 Kawasaki Ninja - 4
'65 (I forget) V-Hull boat - 4

Wow...that'* kinda depressing...

24.... too lazy to list

Hmm... I'll have to think for a bit...

the 87.... 6
the 93.... 6
87 GMC van (red)... 8
87 GMC van (blue)... 8
85 C15... 8
83 C15... 8
92 Chevy van... 8
Three of the exact same model weed eater... 3
Monkey wards mower... 1
murray mower... 1
ariens mower... 1
tiller... 1
chainsaws... 3
power washer... 1

Bringing it to 63. I win.