NEVER use E10 in:
1 Boats !!!!
2 In an Item which will sit for a period of time without use. IE All your fun toys, whipper snippers, chain saws, brush cutters, mowers, blowers, ...........
The Ethanol separates from the petroleum after a period of stand down time, causing damage to those precious loved ones.
I'm not a mechanic but have heard some bad stories from mechanics.
JD.