Cam roller cracked in half-missing

[jlemberg]

I am chasing down an idle stall issue. The first thing I noticed was the Throttle cam roller that Doug and I put on there has cracked off. I know it effects throttle up, but would this effect idle at all, running without a roller? I know that at idle it should be just touching the cam lobe mark at idle, and not opening the throttle valves?

 

[Craig-]

Re: Cam roller cracked in half-missing

No, unless a piece of it is hanging something up, but it should be replaced.

 

[jlemberg]

Re: Cam roller cracked in half-missing

Yes going to replace asap. So much for my 5 minute fix.... back to the idle stall. All else is good, had been running fine, it just started cutting out when in neutral. Not sputtering, just a clean cutoff. Starts right back up. Carbs had been cleaned a few months ago(not sure if they link-n-synched), no ethanol marine gas used since. Any non carb tear-down ideas? Compression is good. The only thing I had changed lately was to gas up with Valvtect marine gas(different marinas than usual).

 

[Craig-]

Re: Cam roller cracked in half-missing

Try a portable tank to test first, go from there. May just be bad fuel.

 

[jlemberg]

Re: Cam roller cracked in half-missing

1. Replaced fuel filter
2. Replaced Cam roller
3. Decarbed
5. New plugs after decarb
6. Ran out old fuel-filled with fresh


Not stalling now, and runs/idles alot better.

 

[ezeke]

Re: Cam roller cracked in half-missing

What kind of lawn mower are you working on? It's amazing how much advice you can get with no idea what you have.

Watch these - they show what happens with a simple air leak, before and after:

http://www.youtube.com/watch?v=nUWbq1GcKlQ&feature=related

http://www.youtube.com/watch?v=cUlYCjKJrfY&feature=related

 

[jlemberg]

Re: Cam roller cracked in half-missing

1999 Ocean Pro 200