Any reason a guy could not/should not, replace the standard lead acid battery required for e-start with a lithium battery - Li batteries are roughly $130 at Batteries Plus and weight in at abt 3-4 lbs. That would be a 10+lb redux in overall weight.
Last year I installed a small Lithium battery after input from others on the forum. Worked great, but could benefit from being a little bigger (I.e. more CA). I had planned to buy a second one and wire them in parallel this year - then tripped over the bigger, single battery altogether for a slightly higher price. The larger battery would fill in the full battery tray and almost exactly the same size as the lead acid OEM unit.
Last year I installed a small Lithium battery after input from others on the forum. Worked great, but could benefit from being a little bigger (I.e. more CA). I had planned to buy a second one and wire them in parallel this year - then tripped over the bigger, single battery altogether for a slightly higher price. The larger battery would fill in the full battery tray and almost exactly the same size as the lead acid OEM unit.