I have a Yamaha G16 circa 2000...I rain bird from the UK - I was given some very useful tips on storage of this type - firstly give the gas tank a good dose of Sea Foam gas stabilizer and run the cart a few miles to make sure the stabilizer has reached all parts.
Secondly Jack up the cart and put it on axle stands so that all wheels are off the ground (this stops the tyres 'flatting' i.e. getting a flat spot where they are in contact with the ground) - I bought 4 x 3 ton axle stands from the accessory store at the Market of Marion for very reasonable $$$ - you will also probably need a hydraulic floor jack - buy from the same place.
Thirdly with the cart jacked up look under the seat and locate the feed from the gas tank to the engine - on mine it's just a rubber pipe with a spring clip on it - take the pipe off - now run the engine until it runs out of gas - you have now emptied the carburretter and this stops it getting all gummy as the gas evaporates during storage. Put the pipe back on - you will never remember to do it when you come back in a year.
Finally purchase a 300 milliamp 'float charger' Wal Mart do them cheap fit that to the battery - a float charger lets the battery go down to about 12.6 v and then cuts in and charges til it reaches about 13.9v at a low level charge - this continuous cycle should keep the battery in good order.
The above takes about half an hour or so and has saved me so many $$$ over the years I have been doing it !!
Good Luck
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