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25 Hp 2007 4 Stroke Short Shaft Electric Start Tiller
Here's an interesting one. So neighbor boy brings over his 25 HP electric start 4 stroke. Says it won't start. No battery hooked to it now but apparently one was on it. Since I'm an old geezer, I hook up my charged 12 volt battery and almost immediately notice the ground wire between the lower units and gearcase is beginning to do an electric light bulb imitation. (Getting hot and smoking) boy's say, never saw it do that but it was in the water, quickly disconnect and after examination, think we find the offending wire. After some pulling and curse words, the motor starts roughly. Took the carbs apart, dirty ..(ethanol use) decide to throw a carb rebuild kit at it because the rubber parts were pretty hard anyway. Still won't start. Both plugs show spark, but it looks a little weak to me. Could a rectifier going bad cause a weak spark? Checked ignition with gun, showing 10 to 11 degrees. ??? What should the ignition timing be? Could that be right? Could the electric brain be fried, or a trigger problem cause a weak spark? I work on 50' mercs and John rudes for fun mostly, need to hear from someone who knows. Help?
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nope the ign system works almost identically to the power pack set up on a jonny rude
it has a charge coil , a pulser coil and a CDI box and 1 ign coil.
its a waste spark ign system.
ign timing at idle is around 7* and about 30* at WOT.
this is going from memory as I don't keep manuals at the house' -
Thanks Rodbolt. Any idea what the factory setting is for the air screw on top of each carb?Comment
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if you look up the specs its EPA.
means once you remove the tamper proof cap you count the turns in before removing it. typically it ends up being around 3 turns out.Comment
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