tweeter6216 Posted November 7, 2003 Posted November 7, 2003 The engine is a Briggs & Stratton 16HP horizontal twin. Model number 402700 Code # 0130 Type # 01. I have a compression of 60 lb/sq.in from the left piston and like 5 lb/sq.in in the right. This keeps the right piston from firing. Would this keep the whole motor from running more than 5 to 10 seconds? Would the right side having little compression fail to draw gas into the carb? I replaced the carb with a used one and still cannot seem to get gas to flow through the fuel pump. Both the original carb and the used one do the same thing. The bowl never fills up with gas. Can anyone help from here?
stumpy Posted November 7, 2003 Posted November 7, 2003 I think in an earlier post you mentioned the original carb worked when you bypassed the pump and gravity fed the fuel, correct? You don't have a carb problem. Disconnect the fuel line at the carb...if there's no gas forthcoming then you either have a bad pump (regardless of it being rebuilt), a clogged fuel line, a restriction where the line exits the tank, or a bad fuel shut-off solenoid (or something related to the solenoid, if so equipped. That pretty much covers the possibilities...no guesswork involved. One of these maladies is keeping gas from the carb. The engine problem may or may not be effecting the gas being drawn into the cylinders from the carb. I suppose that over a few seconds running back pressure could build up from broken rings or a crack or small hole in the bad piston resulting in no gas from the carb to the combustion chamers (just guessing), but that's a completely different issue. In my humble opinion, the gas flow problem to the carb will be a simple fix, regardless of which problem it is. Just check the lines and other spots with problem potential starting at one end and ending at the other. It's immaterial anyway. If you have 5 lbs. on one side and 60 on the other the thing is never going to work right with any real usable power until the problem is fixed. Rings, piston,or a valve on the low jug...end of story. Of course, fixed properly it may be higher than 60 lbs. (just guessing here), some folks (barring economics, of course:)) would do the job on both jugs at the same time. In the very least ya gotta figure out that 5 lb. jug. good luck
tweeter6216 Posted November 7, 2003 Author Posted November 7, 2003 Ummm, sorry i copy and pasted my last post. I just wanted to paste the engine model, type, and code. I fixed the compression problem. I do still have the carb problem though. The fuel solenoid is brand new and i seen it work. Fuel lines are good as well as the filter. Tractor runs fine by dumping gas directly in the throat of the carb. Engine runs till the gas dumped in is gone. Gas is fed by gravity right up to the pump. From there no gas goes to the carb bowl. Can there be some type of air lock or something going on that doesnt allow the draw of gas to the carb? Someone mentioned putting an electric fuel pump on it. If possible, i would like to know how to do that in detail.
MPH Posted November 7, 2003 Posted November 7, 2003 If you can post some pics of your tractor, under the hood, route of fuel line from tank to current pump I'll try to help guide you though it. The one on my 4040 has been trouble free. I might be able to find pics of it if that will help you any. I pretty much followed Paul's set-up on his Fleet of Powermax's..MPH
tweeter6216 Posted November 7, 2003 Author Posted November 7, 2003 What is a good electric fuel pump? Where can i get it? Does everything i need come with it? Do i need to remove or do anything with the old vacuum pump setup?
UCD Posted November 7, 2003 Posted November 7, 2003 Your problem is you have a bad pump and don't want to believe it. If you can connect fuel line directly to carb and it will run but when you connect fuel line to pump and then to carb and it won't run That tells me that the pump is not working plain and simple. The pump is the blockage. Fuel will not gravity feed though the pump because of the valves in it used to move the fuel.
MPH Posted November 8, 2003 Posted November 8, 2003 The one I used is a Puraltor. Think 2-5lb psi. Got it at NAPA for I think around 30 or 40 bucks. May need some gas line hose and a few clamps, maybe a different filter if you don't like the way your current mounts or something. As to the vacuum pump, think all you need to do is plug off the line coming from the engine so you don't have a leak..MPH
tweeter6216 Posted November 8, 2003 Author Posted November 8, 2003 The engine runs when directly running gas to the carb. I know cause i took the guts of the pump out and the motor ran and ran until gas came out the breather tube to the air filter. I know that i am having a fuel pump problem, just dont know what else to do. Both pumps on both carbs DO NOT work or at least that is what i can see. It is almost like the flaps in the pump are not moving when they should to allow vacuum and the exist of gas.My problem is I do not know what else to do or what else the problem could be.
MPH Posted November 8, 2003 Posted November 8, 2003 I confussed, both pumps on both carbs???????????????
tweeter6216 Posted November 8, 2003 Author Posted November 8, 2003 Yes, both pumps. Both carbs do the same thing when mounted on the engine. I am wondering if there may be something other i need to do. I am getting a suction at the vacuum tube for the pump but i am not sure how much pressure i should get. It will suck my finger tip to the hose when the engine is cranking.
tweeter6216 Posted November 8, 2003 Author Posted November 8, 2003 Is a 2.5psi to 4.5psi electric fuel pump efficient for this engine? Could the carb problem still exist if i installed an electric fuel pump?
UCD Posted November 8, 2003 Posted November 8, 2003 Why do you think you have a carb problem ? you say it runs ok with the carb fed directly bypassing the pump. yes that pressure will work just fine.
DanBov Posted November 8, 2003 Posted November 8, 2003 If the two hoses going two the pump are backwards it won't work.This happened with my 6216 . Make sure there on the correct stems .
tweeter6216 Posted November 8, 2003 Author Posted November 8, 2003 Vacuum hose on the right side and gas hose on the bottom, right.
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