Each time I start my Ariens snow blower it smokes very heavily for about 5 seconds, then clears. 6-8 starts so far. The oil level is right; just to top of full mark. This started after tipping it on it's front as specified in the repair manual to grease the fittings underneath for the drive wheels.
The primer bulb does not prime carb. It pushes air out the tube when I disconnect it from the carb. and push it.
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Re: very heavy smoke on start-up & primer bulb prob.
It should be fine, it's just some oil that seeped through and is now in the muffler. Just let it run for a while to burn off what is in the muffler you may also have a little bit in the carb, if you want to check the carb just pull the bowl off to see if there is any thing for oil in there, be sure to shut the fuel off or clamp it off with needle nose vise grips before you pull the bowl off. Otherwise everything will be ok just run it for a while and keep an eye on the oil level.
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As you said, it's probably got a stuck float. If stored without draining and fuel petcock turned off, gas evaporates from carb bowl and sticks float down, allowing fuel to flow all the time.
Solution: Remove carb and fully clean. Carb dip can be effective if left long enough but it will not clean out totally closed-up holes or clogged passages. Cleaners can only dissolve varnish if they can get to it and totally clogged passages won't allow cleaner to flow to where it's needed. Pros use a hot bath of cleaner and/or ultrasonic cleaners.
Start with a carburetor rebuild kit and use as many parts as necessary. Be careful to remove rubber parts like O-rings and gaskets before cleaning with solvents. Adjust mixture screws to factory recommendations and fine tune after you get it running. Good idea to purchase an engine service manual for you particular engine.
I would suggest a new plug and fresh gas and oil mix.push the primer bulb 8-10 times and turn choke to full.pull cord about 4 or 5 times until it starts.if it don,t stay running turn choke to half and pull cord until starts should stay running.let run for about 10 seconds then turn off choke.Almost forgot that during this whole process you hold throttle wide open.
We're talking about a briggs or kohler motor with a bowl type carb- correct? Im assuming you are sure you are dealing with a fuel issue.
To what extent did you rebuild the carb? Did you replace the needle? Make sure all passages are clear? check the float level? Check the setting of the idle air screw ( if present)?
Did you check the quality of fuel coming out of the fuel line and did it have good flow? Its easy to have water in your fuel system and inadvertantly fill your clean rebuilt carb up with water/ bad fuel.
In short, once you've narrowed it down to a fuel issue, youve either missed something in the carb and will need to go through it again or there is bad fuel in your system or the fuel is not reaching the carb.
Fuel Starvation - Float Bowl Carburetor
1) remove air filter assembly
*be cautious of tearing the mounting gasket. If it does tear, you HAVE to replace it. It is part of the priming system
2) remove the float bowl fastener. This is the main jet
3) carefully remove the float bowl, the rubber o-ring/gasket will not be able to be used if it is removed, you WILL have to replace it
4) using a spray 'carb cleaner'
spray up thru the center of the carburetor
spray and clean the main jet with cleaner and 'tag' wire
(tag wire is very thin, and can be used to clean the hole in the center of the main jet)
5) clean any debris from inside the bowl or carb body
6) re-install bowl and center bolt, air filter assembly
*if you need gaskets, your Briggs dealer can supply. The kit is cheaper than individual gaskets, and all the parts needed to finish the above repair are in the kit.