Steve, I’m looking for info on a current part number for the impellor. In the meantime, be aware that there are three rubber parts in that 1949 lower unit. Impellor 276811, Drive shaft seal 202274 and the prop shaft seal 201917. That 49′ Zephyr uses oil, not grease in the gear case, the owner’s manual calls for 30 or 40 W oil., I would use the modern 80 – 90 gear oil.
Joe B
PS, found a new part number for the impellor 276857. The impellor is 2-3/4 ” dia, six lobe X 3/8 thick with a bore measures .680 and had three small lobes to engage with the drive shaft.
PPS, just looked… there are a couple on e-bay now , $15
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