K301 Timing
 

I have a 124 with a Bosh coil and point saver. The points slipped and stayed open all the time so I had to re-time it. The previous owner put a nice white timing mark on the flywheel so I used that and gapped the points at 0.02. It runs and idles really smooth now but hits really hard at least once every time I try and start it. It hits so hard the starter will stop rotating. Is the timing too advanced and do I need to gap it at 0.018 to correct it? Thanks

Time it this way, don't worry about the gap.

http://www.onlycubcadets.net/forum/s...ead.php?t=4405

Bill

My mallware blocks the link.

Put it in the list of accepted sites. Sorry if that sounds blunt, but it's much easier for you to read through Matt's link than to write a whole new one explaining it.

I will try again tonight on a different computer. Thanks

:Morning: Time that engine according to the instructions that came with David Kirks point saver. I have also found that if remove the original adjusting screw from the points and replace with an allen head screw the points will stay where you want them. :American Flag 1:

I think you might have a compression release issue. My 108 does this-it's like the starter can't turn over the engine against the compression and the belt squeals as the starter pulley slips. It "hits" once, then fires right off, so I haven't taken the time to fix it right yet. Need to get the grass cut!

I think you can open the cam cover on the left side of the engine and manipulate the spring on the cam (if it's not broken) back into place to get the compression release to work again. Or so I've read on other threads here, but have never attempted it myself. (yet).

that is an excellent PDF write up!!! Thanks Dbuck for the tip!

:Morning: Your are Welcome. :American Flag 1:

If the problem persists after the spark timing procedure already outlined has been performed, try using a premium fuel. Ethanol enhanced fuels cause all kinds of peculiar problems in older engines.:bigthink:

Depending on your location premium fuel will have just as much Ethanol as the cheap stuff. You have to search out a non-ethanol fuel source in your area.

Yes Austin that is good advice. :beerchug:

I've never had any issue with ethanol in a carbureted engine. I was always able to tune it for the fuel. Only time I've ever seen it be an issue, is when it was old and stale, or in an early fuel injected motor where the PCM just wasn't able/knew how to tune the motor for that fuel.

I got it ironed out. Turns out the original owner didn't put the timing mark on the right spot (I'm assuming since I set the gap at .016 and now it runs great.) I also tightened the point adjusting screw as tight as I could get it and put a drop of locktight on it. No more problems with points slipping out of adjutment.

Tried to crank it this weekend and it wouldn't start again. Checked the gas. Saw some in the bottom of the tank and thought it was the points again. Turns out it didn't have enough gas in the tank to flow into the line.

Hey B,
I believe your ignition timing is still not correct. If the timing mark that is highlighted by the previous owner is the "S" mark (as it should be), the point gap should be "just barely" opening at that crankshaft position - NOT .016" open! Please refer to the PDF you noted.

I'm not sure that's what he meant when he said they were gaped at .016". But I agree, that's not the correct way to time an engine.

Here, take a look at this. I wrote this after this thread was started. Might help.

http://www.onlycubcadets.net/forum/s...ad.php?t=33461

Excellent Write-up! Thanks,