10Propeller ChartTroubleshooting Guide for Gasoline Engines(continued)In the event that none of the above procedures resultsin the engine running properly, contact our servicedepartment for suggestions at:Horizon Hobby, Inc.4105 Fieldstone RoadChampaign, IL 61822Phone: 217-355-9511 (M–F 8:00–5:00 CST)This chart enables you to select the best propeller forinitial set-up of your Zenoah ® engine.Remember, it’s imperative to balance each propellerprior to installation onto your Zenoah engine. Failure todo so may cause unwanted vibration in your aircraft.Note: All recommendations are based on engines usingAPC brand props.ENGINE PROPELLERG26A 16x8 @ 8,700G231 Heli Adjust pitch of rotor to obtain9,000–10,000 rpm of theengine at full throttleG26 MarineG231 Marine Diameter=65–75mmPitch ratio 1.9–1.4mm*G38 Gas 18x10 @ 7,300G45 Gas 20x10 @ 7,200G62 Gas 22x10 @ 7,200GT80 Gas 22x12 @ 7,20024x10 @ 7,200