... Also IP23 IS an option. but rated power will decrease 5%. marine standard altemator IP23 air filter ISan option .but ... than the minimum of BS6861 .P.1. G2.5. Two bearing alternator has a half-keytesting balance.TERMINAL ... ,1 ,2 ,3 ,4 ,5; ∞uphng diSCSto SAE#6.5 ,75 ,8 ,10 ,11.5 ,14 ,16,18 ,21LYG series doubl e ... -beanng. engine adaptor to SAE#OO ,0 ,1/2. 1,2 ,3. 4 ,5 ...