1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 190Get this manual

1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 190

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Check Valve NOTE: heck valve can be replaced by removing intake manifold when powerhe ad is attached to driveshaft housingThe check valve is 316 in(4.76 mm) diameter brass casing containing nylon ball