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Tool Talk Discussion Forum

Re: Time an 18 hp briggs

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GUIDO

12-26-2013 11:12:13
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Hello George Marsh,

I forgot to add that sometimes the timing mark is on the crankshaft counterweight. Either way should be clearly marked............

Guido.




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George Marsh

12-26-2013 15:15:50
50.121.6.110



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 Re: Time an 18 hp briggs in reply to GUIDO, 12-26-2013 11:12:13  
Guido,
I found the very small tiny timing mark. Got new cam today. Installed it. Engine fired off. It also backfired throught carb. The ehow video I watched said intake is from .003-.005 1/4 after TDC. I put it at .003. I may try .005 tomorrow. It just doesn't sound right. Also set it up my old way, TDC, not 1/4 inch below TDC. May do some research and see what others say.
George

George



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GUIDO

12-26-2013 16:10:02
71.168.200.122



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 Re: Time an 18 hp briggs in reply to George Marsh, 12-26-2013 15:15:50  
Hello George Marsh, .003 is NOT enough. Set the intake at.006. They have a tendency to get tight. @.003 won't take long to go to zero,

Guido.



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George Marsh

12-26-2013 18:36:09
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 Re: Time an 18 hp briggs in reply to GUIDO, 12-26-2013 16:10:02  
Looked up clearance on a briggs sight, .003 to.005. Some recommend going a 1/4 inch past TDC. I've always used TDC, except for today. Going to set it at .005 TDC and see what happens. However on older models it shows .004 - .006. I've always found the clearance increases, then the decompression valve doesn't work. Come to think of it, because the cam in new, there may be more decompression than needed, so I may have to go past .006. Starter spins the motor over like there is no spark plug, very little compression. With the bad cam, motor would lock up it had too much compression.

I'll play around with until I get it to work.

Have a happy new year.

George

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GUIDO

12-27-2013 05:49:52
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 Re: Time an 18 hp briggs in reply to George Marsh, 12-26-2013 18:36:09  
Hello George Marsh,

The 1/4 in past TDC insures that you have past the compression release,

Guido.



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George Marsh

12-27-2013 06:38:24
50.121.6.110



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 Re: Time an 18 hp briggs in reply to GUIDO, 12-27-2013 05:49:52  
Guido,
You can feel the compression release. Piston is about half way up the cylinder. I'm going for TDC. Let you know what happens tonight.
George



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