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88 Evenrude, won't stay running?
How big?
Brian -- http://www.advantagecomposites.com/tongass -- My 22' Tolman Skiff project http://www.advantagecomposites.com/catalog -- Discounted System Three Resins products .. "Backyard Renegade" wrote in message om... (Backyard Renegade) wrote in message . com... (Backyard Renegade) wrote in message . com... (Backyard Renegade) wrote in message . com... "Steve Lusardi" wrote in message ... I suggest the fault is the tank, not the motor. The tank is leaking air. The squeeze ball charges the tank. The overpressure tank then feeds fuel to the carb. Check your seals, gaskets, hose and hose fittings. Steve This confuses me. I have always kept the air valve open on top of the fill cap for the tank, the pressure is equal to that outside the tank. The ball has checks in which allow me to build up some kind of pressure in the engine, I have always assumed that once the engine starts, it somehow draws fuel from the tank, in line with the check valves. This could only happen if the engine were somehow sucking fuel from the tank. In fact when I leave the fill cap vent closed, it sucks the tank down (red plastic portable tank). Anyway, I have had a better look this morning and I see that the valve I refered to below does not have an electrical lead, it is more likely a vacume lead, maybe some kind of vacume actuated idle control (idle air bypass)? The choke knob feed directly into this unit which also has two fuel lines running to the carb, one low, one high, could this also control idle fuel? Anyway, to the fuel pump, can someone explain how it works on this engine, that will help me to find it! Is it vacume, or mechanical, in the meantime I will be looking today in better light, thanks again, Scotty, Keep em' coming... Nevermind... I found the fuel pump. It's that thing with springs, valves, and diaphrams that sproings apart when you remove the wrong two screws Everyone carries this pump, well except this year, called 7 dealers, all out of stock till the end of vacation week, ****. Anyway, looking at the pump it seems pretty simple, there is an airway that I imagine leads to the intake, so I guess the diaphram is run by fluctuations in the intake vacume, makes perfect sense to me. Anyway, hopefully this is indeed the problem, I can't see anything else right off hand that would create a fuel or vacume leak anywhere else on the engine. Now off to see why the heck the one year old water pump on the 3 horse merc stopped working... I hate this stuff, I just want to build boats and go fishin'. Scotty Well, anyone? Am I right about the intake pressure fluctuations driving the pump? Looks like it. There is a flame arrest plate in front of the diapharam, this pretty much confirms my suspicions especially since it was clean, no backfires. I know they would not drive the fuel pump with exaust. Anyway, I get the pump on friday, I will let you know. Well, it did not work, the fuel pump and plug wires too, cause it makes sense since I had new plugs and all. Anyway, I am thinking it is carb now after setting all the other perams'. Anyway, I will keep you posted even more... Building a big skiff now, I will post some pics soon. Scotty |
#13
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88 Evenrude, won't stay running?
Hi Ian, the jets are where I am going next, but I did a lot of
cleaning from outside the carb with the needle and such, but I fear I must take it apart and get at the innards. Brian, it is a real Brockway, 16 foot by 7 foot pointy skiff. I will make another thread about it soon. Scotty (Who is one of only two who actually have permission from living Brockways' to sell boats called "Brockways")... To any of you guys down the middle east coast using the name, you should see the family first as I have done. Specially the ones advertizing in the magazines, if not to pay royalties, at least out of respect. But that is still another thread too... Scotty |
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