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Hi Everyone,

Just thought I'd run this by you guys. I bought a second hand Honda HRC216 K1, which I knew was running rough when I bought it. I have cleaned the carb, replaced the air filter, spark plug and oil, and it runs great for about 5 minutes. Then it starts surging and backfiring through the muffler, (after firing I guess to be correct).

It only happens after it gets hot, so maybe a coil pack? I am running Unleaded 91. I don't know if it is related, but once the motor starts to play up, the blades will not engage. While its cold, the blades cut quite happily.

Any advice appreciated!
 

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Check your valves, too.
Intake Clearance 0.15 +/- 0.02mm ( 0.006 +/- 0.001in )
Exhaust Clearance 0.20 +/- 0.02mm ( 0.008 +/- 0.001in )
 
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