---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Fri 03/16/07: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:57 PM - =?us-ascii?Q?Don't_know_where_to_turn!? (Les Goldner) 2. 04:08 PM - Re: Don't know where to turn! (Mike Parkin) 3. 04:18 PM - Re: Don't know where to turn! (Gilles Thesee) 4. 04:44 PM - Re: Don't know where to turn! (nyterminat@aol.com) ________________________________ Message 1 _____________________________________ Time: 03:57:43 PM PST US From: "Les Goldner" Subject: RotaxEngines-List: =?us-ascii?Q?Don't_know_where_to_turn!? I need to turn the shaft of a new 912 ULS engine to put some oil in the cylinders (it has been sitting in its original box for over 2-years) and can't figure out which way to turn it. Sounds like a really stupid question that could be easily answered by reading the Rotax manuals. but: The 912 Operators Manual says "Propeller shouldn't be turned reverse the normal direction of engine rotation" and goes on to say (Page 8-2) that "Direction of rotation of propeller shaft is counter-clockwise looking at p.t.o. side of engine." Sounds easy enough until you also read page 19 in the 912ULS Installation Manual, which contradicts this by saying "crank the engine by hand on attachment screws of flywheel two complete turns anticlockwise (viewed from Magneto side)." Since you can't turn the shaft both anticlockwise from the p.t.o. side while turning it counterclockwise from the mag side I don't know which way to turn the shaft. Can someone clarify this by telling me, looking from the front of the engine (from p.t.o. side toward mag side), which way the engine is supposed to turn? Thanks for the help, Les PS: I expect to begin the 912 installation in about 3-months in a Zenith CH701. ________________________________ Message 2 _____________________________________ Time: 04:08:09 PM PST US From: "Mike Parkin" Subject: Re: RotaxEngines-List: Don't know where to turn! The Rotax rotates anticlockwise viewing from the front. The prop end!! regards, MP ----- Original Message ----- From: Les Goldner To: rotaxengines-list@matronics.com Sent: Friday, March 16, 2007 10:57 PM Subject: RotaxEngines-List: Don't know where to turn! I need to turn the shaft of a new 912 ULS engine to put some oil in the cylinders (it has been sitting in its original box for over 2-years) and can't figure out which way to turn it. Sounds like a really stupid question that could be easily answered by reading the Rotax manuals. but: The 912 Operators Manual says "Propeller shouldn't be turned reverse the normal direction of engine rotation" and goes on to say (Page 8-2) that "Direction of rotation of propeller shaft is counter-clockwise looking at p.t.o. side of engine." Sounds easy enough until you also read page 19 in the 912ULS Installation Manual, which contradicts this by saying "crank the engine by hand on attachment screws of flywheel two complete turns anticlockwise (viewed from Magneto side)." Since you can't turn the shaft both anticlockwise from the p.t.o. side while turning it counterclockwise from the mag side I don't know which way to turn the shaft. Can someone clarify this by telling me, looking from the front of the engine (from p.t.o. side toward mag side), which way the engine is supposed to turn? Thanks for the help, Les PS: I expect to begin the 912 installation in about 3-months in a Zenith CH701. ------------------------------------------------------------------------- ----- 15/03/2007 11:27 ________________________________ Message 3 _____________________________________ Time: 04:18:16 PM PST US From: Gilles Thesee Subject: Re: RotaxEngines-List: Don't know where to turn! Les Goldner a crit : > > Sounds like a really stupid question that could be easily answered by > reading the Rotax manuals but: > > The 912 Operators Manual says Propeller shouldnt be turned reverse > the normal direction of engine rotation and goes on to say (Page 8-2) > that _Direction of rotation of propeller shaft is counter-clockwise > looking at p.t.o. side of engine_. Sounds easy enough until you also > read page 19 in the 912ULS Installation Manual, which contradicts this > by saying _crank the engine by hand on attachment screws of flywheel > two complete turns anticlockwise (viewed from Magneto side)_. > > Since you cant turn the shaft both anticlockwise from the p.t.o. side > while turning it counterclockwise from the mag side I dont know which > way to turn the shaft. Can someone clarify this by telling me, looking > from the front of the engine (from p.t.o. side toward mag side), which > way the engine is supposed to turn? > Les, There is nothing wrong with the manuals. The Rotax engine has a spur reduction gear : http://contrails.free.fr/engine_rotax_reduct_en.php So whereas the props turns in one direction, the CRANKSHAFT turns the other way. At the front you turn the prop, and at the rear what you turn is the flywheel attached to the crankshaft. Do as the manuals say, and everything will be OK. Best regards, Gilles http://contrails.free.fr ________________________________ Message 4 _____________________________________ Time: 04:44:46 PM PST US Subject: Re: RotaxEngines-List: Don't know where to turn! From: nyterminat@aol.com counterclockwise looking at the PTO shaft Bob Spudis -----Original Message----- From: lgold@quantum-associates.com Sent: Fri, 16 Mar 2007 6:57 PM Subject: RotaxEngines-List: Don't know where to turn! I need to turn the shaft of a new 912 ULS engine to put some oil in the cyli nders (it has been sitting in its original box for over 2-years) and can't f igure out which way to turn it. Sounds like a really stupid question that co uld be easily answered by reading the Rotax manuals but: The 912 Operators Manual says =9CPropeller shouldn=99t be turned reverse the normal direction of engine rotation=9D and goes on to say (Page 8-2) that =9CDirection of rotation of propeller shaft is counte r-clockwise looking at p.t.o. side of engine.=9D Sounds easy enough un til you also read page 19 in the 912ULS Installation Manual, which contradic ts this by saying =9Ccrank the engine by hand on attachment screws of flywheel two complete turns anticlockwise (viewed from Magneto side). =9D Since you can=99t turn the shaft both anticlockwise from the p.t.o. si de while turning it counterclockwise from the mag side I don=99t know which way to turn the shaft. Can someone clarify this by telling me, looking from the front of the engine (from p.t.o. side toward mag side), which way the engine is supposed to turn? Thanks for the help, Les PS: I expect to begin the 912 installation in about 3-months in a Zenith C H701. ________________________________________________________________________ AOL now offers free email to everyone. 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