Wash and Brush Engine - Now It Wont Start

[Mangojak Siagian]

I washed and brushed my DS 93 engine a few days ago. I tried to start yesterday and it won't start. I checked spark plug found no sparks. Disconnect the plug from its cable and tried to get a apart directly from cable also found no spark. I saw a cable connection disconnected in front of the engine but no idea where to connect. That cable could be the culprit but not sure.

I highly appreciate your help, suggestion, opinion and input.

Thank you

not a gas guy but maybe this will help



also added your wiring diagram

[Mangojak Siagian]

Thank you for sharing the wire and engine scheme. It is help to understand the mechanic but I am still could not get the spark.

I opened the engine to see the coil and clean it. I also cleaned switches of neutral-forward-backward, still no spark coming.

I worry if one of micro switches failed. Anyone know how to test micro switch?

Thank you.

with a DVM set on continuity, probes on posts , press button
if you have continuity switch is good

[Mangojak Siagian]

Thank you for your response. I will try your way.

I just substituted the micro switches from gear selector to switches in the switch box, I ensure the micro switches are in good condition. I change to reverse buzz micro switch and it works.

Anyone know how to test coil?

Thank you.