My Old G1 won't Start

[Spicyunicorn]

Originally Posted by Matthewreese

Didn't I SAY that I REBUILT the engine (top end) with NEW piston, NEW rings and cylinder.....so there's NO need to check compression because it IS good. It also has a brand-new plug installed.

Hey man we deal with this all the time on here things HAPPEN we are just trying to rule out everything IM out on this ONE!

[mikeasis]

ive seen it several times. even after a rebuild, rings installed in correctly or cylinder bored incorrectly. Not being smart just put a compression gauge on it.

IT HAPPENS!

[nota]

one trick I know on 2 strokes

heat the spark plug on stove
put the hot plug in the motor[
[ careful not burn yourself ]
if it is going to run it will with a hot plug

[chadrockon1234]

you say wet plug it seems like you either have a chokeing issue like a plugged air filter or a plugged exhaust do you get any air out of the pipe? Could the needle in the carb be sticking dumping gas?

[Matthewreese]

Originally Posted by chadrockon1234

you say wet plug it seems like you either have a chokeing issue like a plugged air filter or a plugged exhaust do you get any air out of the pipe? Could the needle in the carb be sticking dumping gas?

I installed a brand-new CDI module and, now it runs great!!:

[Lochlin]

ö

Originally Posted by Matthewreese

I installed a brand-new CDI module and, now it runs great!!:

Then you never had spark to begin with. Bad CDI = no spark.

[mikeasis]

that happens too! you get some spark on a tester and it looks good.
These old systems and their diagnostic tests are not 100 percent perfect.

ive had coils test bad several times and still perform perfectly

[Lochlin]

Originally Posted by mikeasis

that happens too! you get some spark on a tester and it looks good.
These old systems and their diagnostic tests are not 100 percent perfect.

ive had coils test bad several times and still perform perfectly

Bad CDIs will not produce spark. The coil is slave to the CDI. If the CDI is bad the condition of the coil is irrelevant.

When CDIs start going bad they may produce a spark or two at the beginning of the ignition cycle. Nowhere near enough to start the engine and nothing that one could ever confuse with "good" spark.

[Spicyunicorn]

But it had good spark!!!!

[mikeasis]

Originally Posted by Lochlin

Bad CDIs will not produce spark. The coil is slave to the CDI. If the CDI is bad the condition of the coil is irrelevant.

When CDIs start going bad they may produce a spark or two at the beginning of the ignition cycle. Nowhere near enough to start the engine and nothing that one could ever confuse with "good" spark.

yea I was just throwing out an example.


Glad he got it running!