In some cases, once you pull the starter, you may find the chain would turn out at the same time. And you may think the clutch of the chainsaw has broken. 90% of the time, it is the exact reason. But now I will tell you another reason and how to fix it.

How to Find the Problem Part

Firstly, you need to take the side cover, the bar and the chain off on your chainsaw. Now you can check the condition of the clutch and the drum. If the clutch and the drum are good, turn the drum and the clutch also turns. If the clutch turns not as freely as it should, so there is something wrong in there.
Secondly, you have to take the clutch off. Then you can turn the drum that is turning the crankshaft as well to check if it is stuck on that crankshaft. And you need to pull off the drum which should slide out easily. Now you find where is the problem--the needle bearing. The needle bearing in your chainsaw may be broken or destroyed so that it is sticking the drum to the crankshaft.

How to Fix

Step 1: You need to clean all these up first here and put a new needle bearing back on.
Step 2: Clean the inside of the drum up as well and slide it back on.
All the moves mentioned above are general maintenance on a chainsaw. Next here is a little trick here. But not all chainsaws need to do this.
Step 3: Look at the end of the crankshaft, there is a little hole in the center. If you take a little wire or something really thin and poke it in there and it stops, it does not go in further. That means your chainsaw does not have the hidden grease feature on it, but if it goes all the way in when you poke something thin in there, that means you have this feature.

Reason

The only reason why that hole is going that deep is if you have this feature, spin the crankshaft when the clutch, the drum and the bearing are all off there, you will see another little hole in the side of the crankshaft. The hole goes at the end of the crankshaft and comes out to the side hole.
This feature is a way to grease the drum bearing without taking the clutch, drum and the bearing off.

Please let us know if this works and if you have any suggestions or comments. Or you can join HIPA DIY COMMUNITY to feature your passion for repair projects, share your stories with the Hipa family and get help from Hipa.