Sc Fourstroke

I have just got my first four stroke I got it new of someone without any
instruction. can anyone tell me where all the pipes got there are 4 nipples
for pipes 1 is for carb other one for pressure what are the other two for on
the engine.
Thanks
Reply to
Mark
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Depends on that brand of engine you have. With my Saito engines, the third is for crank case vent. Some engines (older O.S.'s) had another nipple. Not sure what that one was for.
tippy
Reply to
dtipton
Engine Link:
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As tippy has described, a 3rd crankcase vent (open to atmosphere) nipple is usually located on the bottom of the crankcase. Where is the 4th nipple located?
Reply to
aeropal
My guess is that it has teh crankcase breather that plums into the intake port. Some of the newer OS engines have that. Keeps the oiling of the engine compartment to a manageable level.
Reply to
Paul McIntosh
ASP FS 70 AR Series 3: "This is a new engine from China's longest serving engine manufacturer and has the latest type crankcase, with the timed breather exiting into the intake manifold giving the fresh fuel charge a slight boost, from the engines bottom end pressure pulses, It also redirects any unused oil back into the engine to improve internal lubrication, not all over the inside of your cowl."
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Reply to
aeropal
The reason i ask is i have the pipes on the way that i would a normal engine (carb and pressure"exhaust") there is another pipe going from the crank case to a pipe branching of the carb which i have put another pipe. The problem is i can't seem to get any fuel from the tank to the carb and cannot get the engine to run is there anything i am missing on setting up a four stroke engine.
SC 70 Fourstroke
Reply to
Mark
You might have the lines (pipes) from the tank swapped. One line is clunk/pickup line to provide fuel to the carb. The other is a pressure/vent line to your muffler tap. If these were swapped, you would have the pressure/vent line connected to the carb. Inside the tank, this pressure/vent line is usually plumbed to the top of the tank. The tank isn't completely full, you'll just be connecting your carb to an air pocket.
This is usually a simple mistake especially if you can't see the where the lines or coming from our your lines are the same color or are not marked to distinguish the difference. I usually use pink/red lines for the muffler line (pink - hot gas) and then I use a blue line for the fuel line (blue=cold fuel).
If that's not it, then the next step will be to hear how you are priming your engine.
tippy
Reply to
dtipton

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