Gas powered boats are by far the most prevalent because they were the first and small trolling motors adapt easily to the application. Gas boats are simple and easy to deal with in terms of service and warranty worldwide. Gas powered boats perform well with a good power to weight ratio. The cons on gas powered boats: Handling of gasoline and oil, maintenance of motors such as frequent oil changes, pull starter ropes - sometimes difficult to start, spark plugs, choke levers, throttle cables and/or levers, etc.
Electric powered boats are heavy (due to 240 lbs. of batteries) and do not perform as well as gas boats – the noticeable difference being in starting from a complete stop. Once underway, the difference is minimal. The list of cons includes dealing with batteries, chargers and wiring connections. On the pro side: no oil mess in the pond water, less filtration and chemicals, no gas and oil to deal with, no starter ropes, spark plugs etc. Overall operational costs are less but initial cost is higher by about $800 per boat. A neat option that is available only to electric boats is squirt pumps.