All e motors have a duty rating on the tag on the motor it will tell You say 50% or 75% duty cly. it means the time it can be run at full HP most compressors for home use have low duty ratings because they are not built to run for long periods of time thats why garages and constuction crews use compressors that are much more expensive , if You realy like Your unit You can go to a motor shop and get a better motor only it gets expensive , compressors are one of those things You get what You pay for , or You can have more coffee braks and let Your compressor motor cool off , I'll go for the latter ,Pete
