u/Educational-Rush5426

I just purchased the KM 131 R engine and a few attachments with it.

I ran the blower attachment through a tank of motomix with no issues.

I then tried running the HT-KM pruner. Bar oil was added, and chain tension was adjusted a couple times during the first five minutes of operation. However, once i started lifting the pruner higher than a 45 degree angle, the chain struggled to rotate. I'd bring it back down and run it below my waist and it would rotate, albeit it with very little cutting power. I removed and reattached from the engine several times and loosened and tightened chain tension several times, both of which didn't solve the problem. Any ideas on what might be wrong? Everything was purchased new from the dealer.