This is a custom Mercury EFI TPS Test & Adjust Harness. It allows you to plug into your EFI ECU systems and connect to your standard multimeter, then read, test, and accurately adjust the Throttle Position Sensor (TPS) to help get your motor running like new.
 
This replaces the Mercury Marine Marine Sportjet Quicksilver Test Harness OEM part numbers 816085 and 91-816085 with an MSRP of $88.92. We included the original instructions above and phone service as needed. 
 
This works on all Mercury Marine V6 2-stroke outboards and Sportjets with front (vs side or horn) injected motors including 105, 140, 210, 240 SportJets, 135 HP, 150 HP,  XR6, Magnum, Pro Max, 175 HP, 200 HP, and 225 HP outboards.