Deskpilot Posted July 28, 2019 Share Posted July 28, 2019 I have an early 503 on my thruster but as yet, have not connected the tacho. Why, because there is no grey wire coming out of the engine. All diagrams say this wire is for the tacho. My question therefore is, how else can I get the correct impulses to operate said tacho? Link to comment Share on other sites More sharing options...
spacesailor Posted July 28, 2019 Share Posted July 28, 2019 Tiny Tacho Has a wire that is wrapped around the spark-plug lead. spacesailor 2 Link to comment Share on other sites More sharing options...
Thruster88 Posted July 28, 2019 Share Posted July 28, 2019 I have an early 503 on my thruster but as yet, have not connected the tacho. Why, because there is no grey wire coming out of the engine. All diagrams say this wire is for the tacho. My question therefore is, how else can I get the correct impulses to operate said tacho? The grey wire is only on dual ignition engines with the Ducati system. If you have the original taho it connects else were, my memory fails me at this time. A new techno will not work on your engine. Link to comment Share on other sites More sharing options...
Downunder Posted July 29, 2019 Share Posted July 29, 2019 Tiny Tacho Has a wire that is wrapped around the spark-plug lead. spacesailor https://tinytach.com/gasoline-tinytach Aust dealer. ..... Flexible Drive Agencies Kensington, Victoria PHONE: 1300 36 37 35 Link to comment Share on other sites More sharing options...
spacesailor Posted July 29, 2019 Share Posted July 29, 2019 Tiny Tacho Has a wire that is wrapped around the spark-plug lead. spacesailor It also, Super light, Self-contained, easily fitted AND Cheap ! I should get a commission ?, OR A boot up the Khyber. For blatant Adds. spacesailor Link to comment Share on other sites More sharing options...
facthunter Posted July 29, 2019 Share Posted July 29, 2019 It's not an add on it's an ad vert. Nev. Link to comment Share on other sites More sharing options...
Deskpilot Posted July 30, 2019 Author Share Posted July 30, 2019 Thanks for your replies, guys, but my question remain unanswered. Guess I'll have to go oversea ans see what the yanks think. Link to comment Share on other sites More sharing options...
spacesailor Posted July 30, 2019 Share Posted July 30, 2019 Frank Thats a very expensive move !. Forget your existing tacho, & Put a "Tiny Tacho" In its place. So quick to achieve your goal. AND no headache either. Rotax is German, so check the German side of things. spacesailor Link to comment Share on other sites More sharing options...
facthunter Posted July 30, 2019 Share Posted July 30, 2019 A solid wire from you magneto is something else to cause grief. The other set up just measures a small amount of induced current from a HT wire. Nev Link to comment Share on other sites More sharing options...
Thruster88 Posted July 31, 2019 Share Posted July 31, 2019 Thanks for your replies, guys, but my question remain unanswered. Guess I'll have to go oversea ans see what the yanks think. My memory now is that the avia sport tacho on a single ignition 503 is connected to one of the two grounding wires that are used to stop the engine. If you google rotax 377 ignition it has the same ignition and no dual system was used on it. Link to comment Share on other sites More sharing options...
fly_tornado Posted July 31, 2019 Share Posted July 31, 2019 the external regulator should have a TAC post Link to comment Share on other sites More sharing options...
Steve Donald Posted August 4, 2019 Share Posted August 4, 2019 Tiny tach is best and safer the old system used to stop the engine with a tack failure. Your question was replied there is no grey wire on that old 503 Link to comment Share on other sites More sharing options...
Deskpilot Posted August 5, 2019 Author Share Posted August 5, 2019 Thanks guys, I'll change to tach. Link to comment Share on other sites More sharing options...
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