pittironworks3 0 #1 Posted March 31, 2012 I have a 1964 704 work in progress . i have seen some motors that have a plate over the spot on the engine block where the fuel pump should be . is there a big difference in having a fuel pump and not having one and does the placement of the fuel tank play any part in this situation . any thought appreciated just to cure some curiosity . Thanks Share this post Link to post Share on other sites
64s 83 #2 Posted March 31, 2012 I'm not an expert on that engine, but I believe it 'should' have a fuel pump. That being said, you really don't need one if the fuel tank is above the carb. I'd run a pump if it were me. Good Luck! I just looked up the engine and it uses the same vacumn fuel pump as the 181, which is part number B-231390-S and no longer available. There are other that will fit. Share this post Link to post Share on other sites
smoreau 658 #3 Posted March 31, 2012 I think that is a vacuum pump for that engine that mounts under the carb. I have one on my 875 and it is necessary if you plan on driving it on any incline or grade. Share this post Link to post Share on other sites
pittironworks3 0 #4 Posted March 31, 2012 Thankyou for the info guys much appreciated Share this post Link to post Share on other sites
squonk 38,967 #5 Posted March 31, 2012 When I got my 704 the pump was shot. It stopped running if the gas got below 1/2 tank. Share this post Link to post Share on other sites
WH nut 553 #6 Posted April 3, 2012 I believe you can put the mechanic pump on the 7hp motor. If Im not mistaken the cam has the fuel pump lobe on it Share this post Link to post Share on other sites
