If you want more power for, for instance, towing a glider, the UL Power 350is with its 130 hp is an excellent choice.

The UL350IS is basically an UL350I engine modified to a higher compression ratio. It runs on Avgas or Mogas 97/98.

Specifications

4 stroke, 4 cylinder, horizontally opposed
Dual (redundant) electronic spark ignition (variable timing)
Electronic multipoint fuel injection (pressure and temperature compensated)
Electronic RPM limiter
Direct propeller drive
5 bearing crankshaft with surface hardening treatment and additional large thrust bearing (ball bearing type)
Single central camshaft
Push rods, tappets and OHV (hydraulic compensators have not been used)
Wet sump forced lubrication with integrated pressure regulator
Ram air cooled cylinders and cylinder heads
Integrated permanent magnet AC generator, external rectifier-regulator
Electric starter
Electric fuel pump and pressure regulator to eliminate vapor lock and facilitate starting even under adverse conditions

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