Home › Forum › Ask A Member › 1962 Johnson Fisherman (5.5) fuel pump? › Re: 1962 Johnson Fisherman (5.5) fuel pump?
OK, I put the instructions in such a safe place I can’t find them. But the gist of it is as follows:
1. Use an OMC kit # 393103 (Sierra 18-7820. The only parts you will be using from it are the diaphragm and diaphragm support.
2. Take the pump apart ONLY at the seam closest to the engine. If you take the rest of it apart, you will find yourself needing obsolete gasket that is extremely difficult to make
3. The new diaphragm will "almost" fit, You will have to adjust the lower holes upward about 1/2 hole diameter.
4. Use the large diaphragm support from the kit. No promises from me as to the reliability of it. I worry it may slide out of position. The original support was riveted in place (??)
5. From here you are on your own.
6. Or just buy a new Sierra 18-7351 pump and go with it.