"get the number off the pump and check ebay, you may get a pleasant surprise"
Been there, done that. In this case, no bargains.
"Is it vacuum operated or crankcase pulse?"
In my world, vacuum and pulse are the same thing. An engine with a piston that goes up and down make pulses. A vacuum-operated fuel-pump has check-valves to created a vacuum.
"Is it possibly a fuel shut off instead of a pump? Or combo?"
My 1995 Suzuki has a combo. Vacuum-controlled shut-off valve under the tank and a separate vacuum-fuel-pump. It also has a "primer" position on the fuel shut-off valve under the tank to make starting easier if it has been run out of gas.
The 1992 Suzuki that I have tore apart has a conventional tank shut-off valve. Just "ON", "OFF, and "RESERVE." That is connected to a large vacuum-fuel-pump that works off the engine crankcase pulses. I say "large" because it is twice the size of a Briggs&Stratton pump. The OEM Suzuki pump is riveted together. I have not tested it yet. Just wondering why I need it at all. I am wondering if Suzuki only put it there to prevent carb flooding when the engine was off and did not want to trust users to remember to turn off the gas-valve.
The Briggs & Stratton pump is only $12. Beats near $100 for the Suzuki pump. I might buy one just to have on hand, IF I don't wind up using it.
Funny this came up. I have a 2000 watt Generac Inverter generator that does not want to start. It has a conventional choke plus a push-bulb gas primer. No matter how many times I push the bulb, it gets no gas. I just tore it apart and to my surprise? The bulb does not pump gasoline like I thought it did. It sends a vacuum signal to a vacuum-fuel-pump. Not working, but all this time I thought it was a direct gasoline primer.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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