I will give you a rule for pull start motors
When cold
1 Pull, good
2 Pulls, still good
3 Pulls and it's running still good
4 Pulls.. it needs service
When warm
1 pull Good. 2 Service
True story: When I worked as a professional ladder monkey (roofer) we had a power ladder (it carried shingles and nails up itself under power.. I'm watching some kid trying for like 30 minutes to start a lawn mower, no joy. (It finally started)
I climbed down, set a box of nails on the platform,, Flipped the shorting bar off the spark plug.. Took just two fingers,, ,Pulled the rope,, Steped on the pedal and ran the platform up the ladder to my boss.. Shorted the plug and that kid .. Well if looks could kill I'd not be typeing this.
We had just had it serviced. then the mechanic had messed up one thign, I fixed that and thus it ran perfectly....
I lader did the same for a bunch of chain saws.. but that paid better.