2000 Kodiak 400 installed known-good carb, but still won't start
Jun 6, 2016 | 08:03 PM
#11
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Trailblazer
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Ah yes...was thinking 2-stroke...sorry! Well...you're definitely getting fuel, you say you have spark...I'm down to compression and timing...I wouldn't think the valves out a bit would keep it from starting...unless one is bent and stuck open/close.
How quickly did the engine flood with fuel? The leak-down past those rings should be pretty slow...
How quickly did the engine flood with fuel? The leak-down past those rings should be pretty slow...
Jun 7, 2016 | 11:32 AM
#12
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Short answer is yes...improper valve seating will impact compression. Does your head have valve windows to check them? Either way if you get a lower than spec compression reading you're probably going to need to start tearing it apart...not a fan of thumpers for this very reason...too many moving parts 
IMHO...
IMHO...
Jun 7, 2016 | 09:05 PM
#13
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Trailblazer
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Short answer is yes...improper valve seating will impact compression. Does your head have valve windows to check them? Either way if you get a lower than spec compression reading you're probably going to need to start tearing it apart...not a fan of thumpers for this very reason...too many moving parts IMHO...
IMHO...
Jun 7, 2016 | 11:47 PM
#14
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From: Whitesburg, TN
If the airbox is full of fuel, the you built the carb incorrectly and it's flooding. Re-visit the carb, get it right, change the oil again and install a new spark plug.
Jun 8, 2016 | 12:29 AM
#15
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Trailblazer
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Thanks, but I think you missed the post where I switched carbs with a known good one, and it still will not start.
Jun 8, 2016 | 09:40 AM
#16
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From: Whitesburg, TN
If you cleaned the airbox prior to installing the second carb ( I assume you did...LOL ), and the airbox is full of fuel again, then the float is hanging/stuck or you have the fuel line connected to a carb vent instead of the fuel inlet.
Jun 8, 2016 | 10:42 AM
#17
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Trailblazer
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The airbox is not full of fuel again.
Jun 8, 2016 | 11:36 AM
#19
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Do you have a manual? I'd think there would be timing marks somewhere to assist in TDC/valve lash adj. Every machine is different and I'm no expert on the thumpers...