Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 60Get this manual
1997 OFI Troubleshooting Guide (continued) Symptom Engine cranks but will not start (continued)
Cause 1.6 Low fuel pressure
Check for fuel leaksIf fuel pressure leaks down faster than air pressure, seals on fuel pump may be leakingCheck air system pressure, see 1.2Replace fuseInspect engine harness and electrical componentsSee 1.2 See 1.4 and 1.5 Check for scuffed piston or other sources of high frictionSee 1.4Crank and start engine several times to purgeCheck motion of throttle armStop nuts should contact block at idle and WOTCheck TPS set-upTPS reading should be in "idle" mode when remote control is in neutralMust connect DDT with adapter harness (84-822S60AS) to ECM to verify this)Clean and inspect male and female connectorsInspect all connectors and harness leads for proper terminationInspect spark plug wiresInspect ground wiresSee 1.2