My Primer pump seems to leak. How do I tell if I have an "old one" or the "newer one"? Also there is a Gasket PN # 2010-70168. Does it fit between the bottom of the primer pump body and where the primer pump screws into the main housing?

Thanks in advance Russ

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1978 300 D 258,000 + miles sold 1995
1983 300 D Turbo 152,000 miles
Thank God for the man who put the white lines on the highway