SUBJECT: Leaf plate & screen assemblies - drain valve.
28 h.p. RX(L)-10 series
35 h.p. RDS(L)-20 series
35 h.p. RD(SL)-21 series
40 h.p. RD(SL)-22 thru 24 series,
40 h.p. RK(L)-24 series.
Figure 1 illustrates the crankcase drain valve plate and screen assemblies used in the subject engines. At first glance they appear to be identical. Note, however, that the drain holes in part 378978 are slightly larger than the drain holes in part 377196. Although the plates are mechanically interchangeable, INTERCHANGEABILITY MUST BE AVOIDED!
To provide more accurate visual identification, the plate for the 28 h.p. engines has been marked with red ink, figure 2, to prevent mix-up with similar plate 377196.
This is another example of parts which appear to be alike in every respect, but are nevertheless different in the final results obtained. When servicing or replacing these parts on the subject engines, be certain you are installing the part specified for the engine being serviced. Remember, the drain valve plate with the red ink is for the 28 h.p. engines!
NOTE: Post on your RX, RD (35 & 40) & RK indexes.