2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 29Get this manual
SPEC Power unit
Specification
Maintenance specification
Unit kPa (kgfcm2, psi) kPa (kgfcm2, psi) mm (in) Model F15EHF F20MHF
F15MHF 730 (7.3, 105.9)
Power unit Minimum compression pressure(1) Oil pressure(2) Cylinder head Warpage limit
860 730 860 (8.6, (7.3, (8.6, 124.7) 105.9) 124.7) 400 (4.0, 58.0) at idle speed
0.10 (0.0039)