swampy2646
Seaman
- Joined
- Sep 19, 2009
- Messages
- 67
be careful when buying quicksilver fuel pump(mechanical) for small block merc. part# 861678A1 either it was manufactured improperly or boxed wrong. the pump is speced at 5-7 psi, mine was tested at over 20 psi. my friend at the parts counter told me they had 5 returned so far with same results. may just be an isolated incident. you should be able to move the pivot arm with the palm of your hand if you cant it has way too much pressure.. FYI