Fuel pump diaghragm kit 857005A1 instructions

[Daniel1947]

I have a 89 Mercury V6 150HP, 0C220883, purchased a Siera 18-7817 fuel pump kit....Yes, I screwed up the little nylon retainers. Just purchased a genuine Mercury kit...has differant retainers and check valve set up which I already researched and found out the old neoprene check valves are not used with the new kit. Problem is in the final assembly instruction diagram. The kit instructions shoe the two gaskets positioned directly against the center block of the pump while the 2 solid rubber diaphragms are postioned directly against the two end blocks (chamber plate and pump base) However my Mercury engine manual shows the opposite positioning; the two rubber diaphrams are positioned against the center block and the gaskets are against the two end blocks. I followed the instructions that came with the Mercury kit, however I have not "tightened" anything down yet. Because of the new check valve configuration should I use the proceedure in the kit instructions. Thanks for everyone's assistance.
Dan

 

[starkyb]

Re: Fuel pump diaghragm kit 857005A1 instructions

I just rebuilt mine according to the instructions that came with the kit which showed the gaskets on the inside against the middle block and it allowed gas to go into the engine block. I figured out that the diaphrams go on the inside and the gaskets on the outside and now it works perfectly. Long story short, follow the Mercury instructions.

 

[Daniel1947]

Re: Fuel pump diaghragm kit 857005A1 instructions

Thanks....but both instructions were from Mercury since the kit was a genuine Mercury kit...so your saying follow the engine manual insturctions which shows the gaskets outside of the diahprams next to the outside blocks amd not the instructions that came with the Mercury kit.

 

[starkyb]

Re: Fuel pump diaghragm kit 857005A1 instructions

Exactly. Mine was a Mercury kit as well. The gaskets go on the outside.

 

[Daniel1947]

Re: Fuel pump diaghragm kit 857005A1 instructions

Thank you for the info Sarkyb....I will do as you have done...Thanks again.

 

[Daniel1947]

Re: Fuel pump diaghragm kit 857005A1 instructions

That is Thanks Starkyb....not Sarkyb...not enough coffee yet....sorry