25 degrees btdc?

[thiede]

Just had my emm rebuilt because of an overheating issue. Upon the timing verification check, using the computer, we noticed the emm calling out a timing spec. of 25 degrees btdc at idle. This sounds pretty extreme to me. Anybody care to comment? (2000 Evinrude Ficht 225)

 

[jaybirdtx]

Re: 25 degrees btdc?

At idle,until the engine is warmed up, the "Quick Start Mode" will advance timing to aid in cranking a cold engine.

 

[seahorse5]

Re: 25 degrees btdc?

The big block FICHT motors will idle anywhere from 15 to 28 degrees. The timing jumps around (just like late model cars) at idle to keep rpms constant.<br /><br />When you check timing with a laptop on a FICHT, you "freeze" the timing at that instant you push the keyboard. That's why the timing number may vary if you check the timing several times in a row.<br /><br />The act of setting the timing is only to sync the computer with the marks on the flywheel.

 

[thiede]

Re: 25 degrees btdc?

Once again prompt, intelligent answers to complex questions. What more could you ask from a forum? Thanks guys!