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  #1  
Old 07-21-2013, 04:51 PM
dzd9fy dzd9fy is offline
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Location: Metro Detroit, MI
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16HP OHV Briggs turns over hard when cold

I have a Briggs 28CH77 that this year has been very hard to turn over when cold, after the enring has been running it will turn over as normal. At times it will turn very slow with it sounding like the battery is almost dead, other times it will not turn at all with the same dying battery sound until i turn the crank by hand with a ratchet/ socket.

I purchased a new battery this year and based upon the hard crank replaced that with another. So I have ruled this out.

I have adjusted the valves to 0.004 at 1/4" past TDC per what I found in the Briggs manual, but still no improvement.

Am I missing something or doing something wrong with adjusting the valves?
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Old 07-21-2013, 07:39 PM
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piston slapper piston slapper is offline
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Sounds like the carb is flooding when it sits...
Turn off the gas when done using it...might help..
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Old 07-24-2013, 10:10 PM
dzd9fy dzd9fy is offline
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Quote:
Originally Posted by piston slapper View Post
Sounds like the carb is flooding when it sits...
Turn off the gas when done using it...might help..
I already tried that one, and does not make any difference.

Guess I will double check I am on the correct side of TDC.
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Old 07-24-2013, 10:26 PM
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dutch1 dutch1 is online now
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If your valves are adjusted properly and you're not leaking fuel into the cylinder, you may have an inoperable/sticky compression release, I encountered one in the 280000 series last year--in an engine that the oil apparently hadn't been changed in a long time.
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Old 07-24-2013, 11:15 PM
ArTurf ArTurf is online now
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Had the same thing going on but with a Kaw. It turned out to be the starter. Pull it and have it tested by a starter/alternator shop if you have one around.
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  #6  
Old 07-25-2013, 02:58 AM
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Restrorob Restrorob is offline
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Quote:
Originally Posted by dutch1 View Post
If your valves are adjusted properly and you're not leaking fuel into the cylinder, you may have an inoperable/sticky compression release

I concur with Dutch, I've seen many worn compression release levers in which a new camshaft is in order.......

From the manual;

Valve Clearance – Intake .003 - .005 in. (.08 - .13 mm)
Valve Clearance – Exhaust .005 - .007 in. (.13 - .18 mm)
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Old 07-25-2013, 08:59 AM
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Sharpcut 1 Sharpcut 1 is offline
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I third the broken/sticking compression release.
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