Makita BHX2500V Questions & Answers

the operators manual specifies 80 cubic centimeters volume of SAE 30 oil

Regards
Peter

About 80 ml or 2.7 US ounces. That's max capacity so when an oil change is performed it will most likely take less. I always fill the engine very slowly, let it rest for a few minutes, then check the level indicator on the oil cap. It's a bit of a pain and time consuming but worth the effort.

Vacuum is weak is strange. I would be looking to see if the fan blades have a build up of stuff clogging them, and also the outlet pipe can be clogged if damp stuff has been picked up and the bag can become non porous if damp stuff is inside. All these need to be clean. The slots are probably to ensure that stones can not be sucked into the blades and change the airflow to ensure that leaves are still lifted through but stones do not get any higher. Stones will break the case. This is mostly designed to pick up leaves and chop them up on the way thought the fan then blowing the chopped leaves into the bag.. An ordinary or commercial or ducted vacuum cleaner would probably be a fair bit better at sawdust..