UMS 7-90 cc User Manual Download | Manualshive

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Gas Radial Engines

User Manual For

Technologies Limited

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Summary of Contents for 7-90 cc

Page 1: ...Gas Radial Engines User Manual For Technologies Limited...

Page 2: ...OT a toy It must be operated with caution and common sense and requires some basic mechanical ability Failure to operate this Product in a safe and responsible manner could result in injury or damage...

Page 3: ...fuels used in model engines are poisonous Always ensure gasoline and fuel are stored in a clearly marked container away from the reach of children Safety Warnings Model engines produce a substantial a...

Page 4: ...tilize an electric starter to start your engine Always discard any propeller that is nicked scratched cracked or damaged in any way Always run your model engine in a well ventilated area Model engines...

Page 5: ...d the mounting ring will damage the mounting ring and cause the engine to separate from the airframe WARNING Always attach the engine mounting ring to a at plate surface such as 6 8mm plywood or carbo...

Page 6: ...nuts with bolts through the rewall 3 Make sure the fuel tank is no farther than 200mm 8 in from the back of the rewall Always use a fuel lter inside the fuel tank W e recommend using large 2 5mm inner...

Page 7: ...e engine exhaust tube with the baf e The exhaust tube requires direct air cooling to prevent damage to the exhaust valve It is very important to consider adequate cooling inside the airplane cowl Engi...

Page 8: ...ting the engine on a test stand or on an airframe If you choose to mount the engine on an airframe remove the cowl during break in to ensure adequate cooling Engine Break In Process Fuel Selection Bre...

Page 9: ...nutes to warmup Use a high quality gear oil to lubricate the outer parts of the valve train at the beginning Starting the Engine accumulate excess fuel or oil either in storage or during the priming p...

Page 10: ...PM Richening the high speed needle allows the RPM to increase when the airplane is ying 1 Start the engine 2 Move the throttle stick up until the engine is running at approximately 2 000 rpm 3 If you...

Page 11: ...hesitation the low speed needle is adjusted perfectly If the engine slowly responds to throttle change and gradually reaches peak RPM the low speed needle is too rich Lean out the low speed needle tu...

Page 12: ...valve lash as close to 0 1mm as possible If the valve lash is between 0 05 and 0 08mm you do not need to adjust the valve lash The settings for the intake and exhaust valves are the same b If adjustme...

Page 13: ...r Size Tested at Room Temperature Note Engine CC Engine No Test Report Temperature 0 C Temperature 0 C Temperature 0 C Temperature 0 C Temperature 0 C Temperature 0 C 2 3 4 5 6 Thrust Kgs Max RPM Min...

Page 14: ...6 3X3nos 132pcd FIRST CYLINDER...

Page 15: ...Notes...

Page 16: ...Gopal Bagh 1062 Avinashi Road Coimbatore 641 018 INDIA Tel 91 422 2243439 5 Lines Fax 91 422 2242760 E mail support umstech in Web www umstech in...

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