need help with ignition coil module on 1980 R7070

You sound like you know what you're doing, so pardon me for this stupid question....What are you using for a spark plug? It's not some weird one with an extra internal gap for "more power," is it?

Maybe your flywheel was replaced at some point, with the wrong one....

If it were me, and I got a fourth module, I would probably close the plug gap down to .020" inch and see how that worked out. It might foul too fast or it may make it a little easier on the module....Just an idea.

An R7070 is a cool mower, worth the extra effort!
 
i did buy a used flywheel, and have installed it....i'm waiting on a replacement ignition module from the vendor on ebay (i sent the other one back, and he has agreed to replace it)

i am using a standard replacement plug for the original plug...i don't remember the number, but it was recommended by lawn boy dealer, and several other forum members. i will try closing the gap a bit...thanks everyone, i will keep you posted with results of new module and flywheel! WHAT ELSE COULD IT BE??? LOL...Rick
 
It is so easy to check for spark, I'm sure you know how to do this before you screw the sparkplug into the engine? Just a light spinning of the flywheel in a clockwise direction, should produce a spark at the plug, with it grounded to the outside of the engine. If it won't spark, then it won't spark when installed.
 
yes, thanks...i know how to check spark, and i always have spark after replacing the ignition module. but that quickly changes after the module fails. sometimes it takes a few weeks, sometime just a matter of minutes!
 
ok, i put on different flywheel, and installed replacement ignition module....SO FAR SO GOOD! started right up, and have mowed several times now without problems! i do have one other question concerning tuning the carb. i took apart the carb last night and cleaned it out ( i noticed that float was sticking, and was able to fix that also) but as i put it back together i noticed that it does have an adjustment screw for air mixture on from side of carb. what is the best way to adjust that? just turn in slowly til it starts crappin out, and back out a little (like the old carburetors on cars??) anyone know? thanks, Rick
 
razman said:
ok, i put on different flywheel, and installed replacement ignition module....SO FAR SO GOOD! started right up, and have mowed several times now without problems! i do have one other question concerning tuning the carb. i took apart the carb last night and cleaned it out ( i noticed that float was sticking, and was able to fix that also) but as i put it back together i noticed that it does have an adjustment screw for air mixture on from side of carb. what is the best way to adjust that? just turn in slowly til it starts crappin out, and back out a little (like the old carburetors on cars??) anyone know? thanks, Rick
Click to expand...

Here's how I like to adjust any two-cycle carb: let the engine warm up fully and see how it performs under load -- keep making small adjustments on the needle valve until it does best. Keep in mind that how it sounds sitting still isn't the most important thing -- it's how it cuts through heavy/wet grass. :cool:
 
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