| 摘要 |
PCT No. PCT/SE92/00319 Sec. 371 Date Jan. 13, 1994 Sec. 102(e) Date Jan. 13, 1994 PCT Filed May 15, 1992 PCT Pub. No. WO92/20574 PCT Pub. Date Nov. 26, 1992.An outboard boat propeller drive unit with an anti-cavitation plate (6) above the propeller or propellers (4,5) has an exhaust duct (7) extending through the anti-cavitation plate. The exhaust duct (7) has its outlet port (11) located on the underside of the anti-cavitation plate level with and just above the sweep "a" of the blade tips of the aft propeller. |
