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no spark Robin engine

wbooker's Avatar

Join Date: Mar 2008
Posts: 1

03-12-08, 10:32 AM   #1  
no spark Robin engine

Someone out there help me. Robin EH18V lawnmower engine will not fire. This is the following that has been done. New plug-no fire. New coil-no fire. Pulled flywheel and key is fine. All safety wires disconnected. I am not a novice at this but this has got me stumped. Please help.

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31YTech's Avatar

Join Date: Feb 2008
Posts: 1,263

03-12-08, 05:16 PM   #2  
Well, This is pretty much a cut and dried ignition system.

When you say all safety wires disconnected did you leave the kill wire off the coil ? The kill wire is held to the engine block with a small clamp that could be shorted out.

Did you set coil to flywheel magnet air gap at 0.012"-0.014" ?

I have heard of flywheel magnets getting weak but have never ran across one, Will the blade of a screwdriver stick to it fairly well ?

Also, I checked the service manual for coil resistance/test specs. but none were listed. There is a chance you got a new defective coil. ?


cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,570

03-12-08, 06:08 PM   #3  
Are you grounding the spark plug body while checking for spark? Hate to ask, but you know.....

"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

AAWrench's Avatar

Join Date: Feb 2008
Posts: 94

03-12-08, 06:36 PM   #4  
I am not sure it's even possible to do this on a Robin engine, but many engines if the module is installed upside down that could cause a no spark situation.

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