This is the Carburetor for the Zenoah G260 PUM Marine Engine, ZENG0260. FEATURES: Three needle floatless Walbro carburetor with diaphragm pump allows fuel tank to be mounted in any position INCLUDES: Carburetor for the Zenoah G260 PUM Marine Engine REQUIRES: Installing on engine and connecting throttle linkage SPECS: Carburetor Settings- Carb is factory set, readjust only if engine is running incorrectly Idle Screw: Turn clockwise to increase idle and conterclockwise to decrease idle Low Speed Needle: 1/4 turn open from maximum RPM position High Speed Needle: 1/8 - 1/4 turn open from maximum RPM position jxs 03/30/10 ir/jxs