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18 HP V-Twin Briggs and Stratton Vanguard won't start


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05-05-14, 03:34 PM   #1  
18 HP V-Twin Briggs and Stratton Vanguard won't start

Hopefully Cheese or some of the other guru's will see this thread.

Got a 18HP V-twin with,
Compression, checked both cylinders with a gauge. Cylinder 1 has 105psi and Cylinder 2 110psi.

Spark, also have the type of gauge that plugs to the spark plug and wire and the spark is bright orange and sparks often.

Fuel, I took the hose off at the fuel bowl,turn the key and fuel sprays out that hose and know that the bowl is full of fuel. The plugs aren't real wet though.

I removed one of the plugs, shot starting fluid in, replaced the plug and turned the engine over and it did not fire. So that led me to think that fuel is actually getting to the piston. So I removed the flywheel and checked the key and that was fine.

I pulled the fuel bowl solenoid and held the plunger and touched it against metal and turned the ig, key and it does work. It did pull in more than maybe 3/16 of an inch.

I did find a cracked fuel line and replaced it. Other than that I am stumped.

 
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05-05-14, 03:51 PM   #2  
Hello and welcome,

When you pulled the fuel solenoid, did gas run out of the carburetor?


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05-05-14, 03:53 PM   #3  
It did. The bowl was full.

 
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05-05-14, 04:00 PM   #4  
Okay, just checking because sometimes the fuel pump can spray fuel but not get in the carb.

Sometimes the linkage to the carburetor slips and the choke does not engage, especially on the v-twin inteks. Can you verify that the choke is fully closed?


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05-05-14, 04:02 PM   #5  
Yes I removed all the air cleaner parts just to see and it does close.

 
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05-05-14, 04:18 PM   #6  
Pull both plugs and pour about a tablespoon of gas into each cylinder, put the plugs back in, and see if it will start momentarily.


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05-05-14, 04:26 PM   #7  
Ok I will try that when I get home tomorrow.

I did try spraying starter fluid in one of the cylinders and it didn't fire. But I should try gas in both?

 
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05-05-14, 06:14 PM   #8  
Yes.
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05-06-14, 04:20 PM   #9  
Hey cheese,
It did fire with fuel in both cylinders. So that points me to the carb. Solenoid or a dirty carb?

 
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05-06-14, 04:24 PM   #10  
One or the other. If the solenoid is working like you mentioned, then I'd say the carb jets are clogged.


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05-06-14, 04:28 PM   #11  
I checked the solenoid and it seemed to pull in but not sure if it is far enough. About a1/8 to 3/16. That doesnt seem to be very far but my spare that i have travels about the same distance. Is that about normal.

 
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05-06-14, 08:04 PM   #12  
If you can't push it in any farther than it's pulling in, then it's going all the way.


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05-07-14, 04:25 AM   #13  
Ok then it must be good because it does pull in and I know it is getting 12 volts.

Gonna tear into the carb and clean everything that I can.

Will let you know what happens. Thanks I really appreciate it!

 
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05-07-14, 03:22 PM   #14  
Hey Cheese,
Ended up giving my carb a good cleaning and it ended up firing right up. Learned some more about these engines. I appreciate it.

Off to the tuff torq thread.lol

 
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05-07-14, 04:18 PM   #15  
Glad you got it. I just finished working on the same problem on the same engine. Now that mower is having transmission problems. Go figure, must be something in the water...


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