Compare: Gas Breakers Technical Details GB-70 GB-90 Weight: 70 lb 90 lb Beaker type: standard standard Shank size: 1 1/8″ x 6″ 1 1/8″ x 6″ Engine: Honda GX 501 cylinder 4-stroke50 cc2 hp0.22 gal fuel capacityFan cooled Honda GX 501 cylinder 4-stroke50 cc2 hp0.22 gal fuel capacityFan cooled Sound power level: 100 dB(A) 100 dB(A) Single impact ft. lbs.: 64 76