My 60FE0 doesn't seem to get get full throttel

[baksmällan]

My 60FE0 6H2 S 100508 seems to be in different moods different days. Somtimes it runs perferctly and sometimes it doesn't want to give power just mumbeling at say 60% power. Then suddenly it spinns again. I get the impression that the fuel line suddenly gets clogged/unclogged.

Where should I start to look to resolve the problem?

[almetelo]

Desassembly carbs and clean them with compressed air (I also use brake cleaner but remove all ruber parts) and have a look on fuel pump (dont use compressed air here or any other product)
If this does not work test spark, compression and timming.

Good luck

[99yam40]

if you think there is a problem with fuel supply then you should start with testing/monitoring the fuel pressure/vacuum to see what is going on while the problem shows up.
A leaking fuel pump can dump too much fuel into crank case of the cylinder the lift pump is attached to. that is if this is a 2 stroke,
not sure how lift pump is set up on a 4 stroke

[almetelo]

its a 2 strk, 3 cylinder, autolube/precision blend (no T/T)