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684i B4 / TS / QS Engine Manual

more infos: www.3w-modellmotoren.com

ENGINE MANUAL

684i B4 / TS / QS

www.3w-modellmotoren.com

684i B4

684i B4 TS

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Summary of Contents for 684i B4

Page 1: ...684i B4 TS QS Engine Manual more infos www 3w modellmotoren com ENGINE MANUAL 684i B4 TS QS www 3w modellmotoren com 684i B4 684i B4 TS ...

Page 2: ...of power And a 36 month conditional warranty We wish you plenty of fun and success with your new 3W engine Sincerely The 3W Team Limited Warranty We grant a 36 month warranty from the date of purchase This warranty is limited to the replacement of defective parts that are a direct result of faulty material or manufacturing No claim concerning a defect caused by non compliance with installation or ...

Page 3: ... adequate 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 hand to start your model Adjust your carburetor correctly Not adjust your carburetor while the engine is running Insure that your spark plug is in good condition and is secured correctly Insure that...

Page 4: ... engines 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 ensure a tension free mounting of the engine The surface that the engine is mounted on must be on an even plane i e a flat and level surface so that there is no strain on the engine itself Again thi...

Page 5: ... and 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 intake Also to keep this air cooling process working the incoming air must be exhausted Further the exhaust air outlet should be four times 4X the size of the cool air intake Example 10 square inch...

Page 6: ...verheated condition where sealed ball bearings 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 instructions and recommendations in this manual will keep the engine operating comfortably within the normal temperature range Rear induction Carburetors whether ...

Page 7: ...ets 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 this bracket should be at the canister s center of gravity 3W canisters have a reinforcement ring at this location We suggest creating two compartments in the front section of the fuselage by instal...

Page 8: ... the 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 have not drilled the propeller correctly This can lead to sheared propeller bolts Balancing your propeller is absolutely critical to the health of your engine You must keep your propeller balanced Pr...

Page 9: ...nd 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 mixture of 32 1 or even 30 1 Use this fuel mixture for approximately 2 3 hours of run time Use a high Octane unleaded fuel 98 Octane is ideal We suggest starting the break in process of the engine ...

Page 10: ...form 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 Oil at 100 1 Note The engine needs 12 20 hours running time for the break in process to be 100 complete Additional installation notes There must be a minimum 4 separation between anything attached to ...

Page 11: ...h could 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 cable ties Warning Failing to read and follow all of the instructions in this manual can lead to unsafe conditions and damaged equipment Here are some examples Unbalanced propellers can damage the eng...

Page 12: ...used 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 the following agenda for your own safety before starting Check the propeller bolts for tightness Check that the spinner is firmly attached Check the propeller for possible damage Check to be sure yo...

Page 13: ...not 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 tachometer tune the engine for maximum power with the high needle H 2 Again using the tachometer richen the high needle H until the motor runs 100 200 RPM less than the maximum RPM Now you are tuned...

Page 14: ...gh 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 be sure it is rigid Check to make sure the engine is mounted on a level surface so that the crankcase is free of tension Check the engine and propeller bolts The engine doesn t reach a normal RPM a...

Page 15: ...Stroke Course 50 mm 1 97 in Speed range Vitesse de rotation 1200 5000 min 1 rpm Weight Poids incl ignition 16 000 g 35 27 Ibs 16 350 g 36 04 Ibs Crankshaft 5 Ball bearings 5 Roulement à billes Connection rod Bielle Needle bearings on both ends Roulement à aiguille aux deux cotés Gasoline Version 1 50 1 80 Mix full syntethic oil high Octane unleaded fuel 98 Octane is recommended IIS Ignition V cc a...

Page 16: ...V 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 devices the ignition box gets warm under operating conditions For that reason a simple airflow has to be guaranteed Therefore the 4 delivered rubbermounts have to be used for installation insuring a...

Page 17: ...car votre droit de garantie en cas de réclamation n est valade que sur présentation de ce document Cette garantie est valable seulement si accompagnée d une preuve d achat Facture du revendeur Condizioni di garanzia Riconosciamo una garanzia di 36 mesi dalla date di acquisto Questa garanzia si limita esclusivamente alla sostituzi one gratuita dei pezzi difettosi la cui causa è da imputare a difett...

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