Honda BF115A, BF130A Outboard Motors Shop Manual., Page 422Get this manual
3) Disconnect the pressure regulator vacuum tube from the pressure regulator, and clamp the vacuum tube4) Remove the propellerSet the outboard motor gear case test tank filled with waterStart the engine and measure the fuel pressure at idlingStandard pressurespeed 75050 5) 265314 kPa (2.73.2 kgfcm2, 3846 mi)
[PRESSURE REGULATOR
When the fuel pressure is outside the specified standard pressure, check the following-When fuel pressure is higher than standard pressure: Check the pressure regulator return hose for kinking or restrictionsCheck the pressure regulator for proper operation (Inspection: P5-46 of the base shop manual)-When fuel pressure is lower than standard pressure: Check the pressure regulator for proper operation (Inspection: P5-46 of the base shop manual)Check the fuel filter (high pressure side) for clogging (Replacement: P5-31Check the fuel pump unit (Inspection: P5-48 of the base shop manual)
[2] VACUUM TUBE