450 foreman wont start - Honda Foreman Forums : Rubicon, Rincon, Rancher and Recon Forum
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post #1 of 6 (permalink) Old 12-09-2010, 01:13 PM Thread Starter
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450 foreman wont start

My foreman has been running fine, until earlier this week. I shut it off and the next day it wouldn't start. It has spark, and a new plug. It kinda wants to start when I spray starting fluid in it. Thanks for any help.
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post #2 of 6 (permalink) Old 12-10-2010, 01:29 AM
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You need three things for an engine to run. Air, fuel, and spark. Take one away and the engine won't run. Sounds like you have spark, so check the other two. Part of the air equation is compression. Good luck, and let us know what you found.
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post #3 of 6 (permalink) Old 12-10-2010, 01:36 AM
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Try draining the carb and see what it does.

2007 420FM (475cc, 27x12x12 Mudbugs) ---------- 1995 300FW (webcamshaft, 350 rear end)
2008 420FE (26x9x12 BearClaws) -------------------
1988 300 (old stock machine, nothing fancy)
2009 420FA (25x8/10x12 BearClaw HTR) ---------
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post #4 of 6 (permalink) Old 12-10-2010, 09:51 AM
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Try a new plug anyway. I have seen plugs, when pulled and grounded to the frame to check for spark, have spark, but when installed, it dont fire...

03 Foreman ES
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post #5 of 6 (permalink) Old 12-10-2010, 09:57 AM
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i had a riding mower do that to me and i did everthing and cleaned everything and replaced everything finally had the carb cleaned at a shop and it runs fine now probaly just some trash in the carb those things are sensitive.

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post #6 of 6 (permalink) Old 12-11-2010, 04:50 PM Thread Starter
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Thanks for the help so far. I have completely taken the carb apart and cleaned it 3 times. I haven't seen any trash in it. I drained the gas tank and filled it with new gas. I have tried 3 new plugs, all seem to have a good blue spark. It doesn't want to fire when i put gas in the cylinder. What should the compression be? This has me really stumped. It ran great before. Thanks for all of the help.
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