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Mine was the old DSAI ignition that had been previously converted to MDI. It only takes a minute or so to access the coils. I’m going to replace the other old one today to see if the steering diode was in fact part of the problem.

The presumed bad coil had physical damage to the plug wire, where it had rubbed on something. Not going to say that it’s not possible for the other coil to also be faulty though. I’ll replace the other coil today and see if that helps anything.

If that’s the case, are the coils side specific?

I replaced the kill wire between the 2 coils

Last week I noticed my mower with Kohler SV840 was only firing on one cylinder. I checked for fuel, spark, and compression. Found a no spark condition; upon further inspection found a bad wear mark in the plug wire. New coils came in today (Amazon) replaced faulty coil, set air gap. Started...

Final update, both mowers used the same drive pulley/belt and deck clutch/belt. The only modification I had to do was drill out the engine mounting holes on my mower and re-route the choke cable. Everything else was a direct swap including the engine wiring plug. Got it all bolted on and...

Ok, so far this swap has been nearly bolt on, again 2009 26hp Briggs to 2011 27hp Kohler. I had to drill out the mounting holes on the engine mounting surface slightly, re-route the choke cable, I currently have the Kohler engine mounted, running, and throttle/choke cables adjusted. Next task...

I have a 2009 Bad Boy ZT with 27 go Briggs engine, the engine is locked up. I can get another bad boy ZT with 27 ho Kohler …..would that engine swap be possible or am I wasting my time pulling them off

Hey all, I’ve got a 2008 ZT pro 60” with the 26hp Briggs. I’m not able to engage the blades, I have checked the main fuse, connection to the clutch, tested pto switch, and manually applied 12v to the clutch which I did hear an audible click. With the pto switch up (engaged) if I get off the...