My RR was always started after a week or two with a 5 sec crank, pump gas 3 times, crank again and good to go. But lately i crank it for 5 sec about 4 or 5 times with no start i know its getting fuel then after the 4th or 5th crank as i release the key i feel a shutter or something like the ignition got a spark, then boom fires right up and runs fine this seems to only happen when cold and sitting more than a few days. what could this be? what is going wrong? Thanks