3W 112i B4, Manual

Page 1: ...ENGINE MANUAL 112i B4 QS www 3w modellmotoren com...

Page 2: ...en designing two and four stroke engines for gasoline and diesel for 38 years We are continually looking at new technologies and working on new designs Please be assured that we at 3W always strive to...

Page 3: ...ur primary concern Therefore any alteration modification or addition to the engine is not recommended and will void your warranty immediately Warning This engine is not a toy Serious injury and or dea...

Page 4: ...equate filtering of your fuel Maintain your engine properly keeping it clean etc Use a pre flight check list before flying your model Secure your model properly when starting Not use your fingers or h...

Page 5: ...gines up to 106cc or 3 8 aircraft plywood for engines in the 150cc class For builders experienced with making composite motor boxes a comparable strength should be attained It is absolutely vital to e...

Page 6: ...nd then away from the cylinder s Cavitating hot air can will overheat the engine Engine Cooling A proper cooling system is vital for any engine An air cooled engine requires an appropriately sized air...

Page 7: ...and needle bearings could be damaged Further you risk an elongation of the heated engine parts and or having an oil film build up which could lead to a seized piston or pistons Following the instruct...

Page 8: ...Refer to our special ignition description for further information Canister mufflers To prevent damage to the header s a flexible support bracket is required to mount the canister s The location for t...

Page 9: ...e center bore using a bolt and nut Drill one hole put one of the propeller bolts into the hole Continue until the last bolt is used If you cannot hand tighten all of your prop bolts easily then you ha...

Page 10: ...accurate around idle where it really counts Engine Break In Use a 2 stroke petroleum based oil preferably ashless as this type of oil has a good honing effect which helps to break in the engine Use a...

Page 11: ...rm well The list below shows some 2 stroke oils that our customers from abroad have used with success Pennzoil at 50 1 Redline at 40 1 Amsoil DOMINATOR Racing Oil at 50 1 Amsoil Saber 100 1 Pre Mix Oi...

Page 12: ...ould cut the fuel supply for the engine see tank photo The use of soldered on DUBRO barbs on the ends of the brass tubing is highly recommended Again always secure the fuel line with small plastic cab...

Page 13: ...ed for proper operation Important Using unauthorized products or failing to follow the instructions in this manual will void your warranty immediately Pilots check list We strongly recommend checking...

Page 14: ...recommended to open the throttle abruptly Precision tuning of the carburetor The use of a tachometer is highly recommended And again never adjust the needles while the engine is running 1 Using the t...

Page 15: ...and is vibrating strongly Balance the propeller Check the ignition timing Check your plumbing for air fuel leaks Check your spark plug for carbon and check the spark plug gap Check the motor mount to...

Page 16: ...mm 1 42 in Stroke Course 26 mm 1 02 in Speed range Vitesse de rotation min 1 rpm Weight Poids Ibs incl ignition Crankshaft 3 Ball bearings 3 Roulement billes Connection rod Bielle Needle bearings on b...

Page 17: ...112i B4 QS Engine Manual more infos www 3w modellmotoren com mounting bolt pattern ATTENTION this drawing is in 1 1 size disable any Acrobat print setting to fit it into paper size...

Page 18: ...20 kV Rpm max 12 000 rpm 12 000 rpm Magnet red north pole upper dead point upper dead point Magnet green south pole 55 o before upper dead point 55 o before upper dead point Like all other electronic...

Page 19: ...icat car votre droit de garantie en cas de r clamation n est valade que sur pr sentation de ce document Cette garantie est valable seulement si accompagn e d une preuve d achat Facture du revendeur Co...