smoknrv4

My Feedback: (11)

Not sure whats going on here but my second season with my 60LX is not that good so far, its been using plugs quite often and its not running too lean either from what I can tell because it barely unloads in the air, on my Juno F-20. Seems like there is too fine of a line on the needle valve tuning, I'm using an APC 9x8 on 15% omega (pink) fuel with a 3oz's extra oil per jug, and K&B 1L plugs which seemed to work fine before, also I'm using a Jett 8oz bubbless tank. The other day the head bolts came loose which is telling me that in ran lean, it was a humid hot day though could that have been why it went lean?
Just can't seem to get it right this season.
Should I try adding the spare shim the engine came with? It already has a head shim from Dub in there.
Thanks

bob27s

My Feedback: (19)

The 60LX had some bizare habits. Nothing we could track down, it all came down to what airframe, time of day, phase of moon most of them ran great, and handful blew plugs for no reason sometimes.

I think you have one of the later ones that Dub changed a few things on. If not, you might want to drop him a note directly.

One suggestion try both a 9x7 prop and a 10x6 prop. Get it out of the powerband it is running at now.

smoknrv4

My Feedback: (11)

Thanks for the reply Bob, I ended up trying another head shim and havn't had an issue since.

cheers

bob27s

My Feedback: (19)

Glad that worked!!! Sometimes a few .001 of an inch makes a difference.

For a while I recommended an extra glow plug washer sometimes that works too. But stressed the threads a bit too much.