I have 2001 Yamaha F100 four stroke that I dont get to run frequently enough. The carbs are clogging/gumming up a good bit. In addition to running the engine more frequently, any tips or advice on keeping the carburetors clean? Fuel additives? Any way to spray carb cleaner in without substantial disassembly?<br /><br />As a side note, do electronic fuel injection four-strokes have clogged injector problems similar to clogged carbs?<br /><br />Thanks for any info.