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niper99 |
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private |
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| Number of Posts |
106 |
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| Date Joined |
Dec 2, 2007 |
| Date Last Access |
Jul 3, 2008 8:14 pm |
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Re: 9 horse tecumseh compression
#1 Jul 3, 2008 8:13 pm |
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25 psi of compression is way to low, u want at least 75 psi min. has the engine ran recently ?, l would inspect the head gasket.
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Re: Tecumseh engine quick demise.
#2 Jun 27, 2008 3:19 pm |
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Since I'm confused about what's going on with the weak compressions and my thinking it's due to a compression problem I came up with a test which I think is valid. I hooked up an air compressor through an adaptor to the spark plug hole. I got the engine at TDC on the start of the power stroke. Both valves should be fully closed. 40-50 psi of air was pumped in and there was leaking from the carb muffler area. After taking off the carb and muffler, air was coming from the exhaust port. On trying to block it off with my thumb there was significant pressure against my thumb. After thinking about how that's possible I thought possibly the tappet might be lifting the valve. There was 8 thousands clearance which is the max so ok. There must be a poor seating between the valve face and seat. I lapped the valves but did not pre-grind them. I don't have the tools for that. I figured a good lapping would be enough. On inspecting the face and seat they looked ok with a magnifying glass. ?? I guess not. I think I've found the problem but if anyone has any comments about the test please let me know. Will re-lapping be enough? trouts
trouts
Will re-lapping be enough? no, if there a that much of a leak u got a serouis problem, is this the same engine that would'nt run ?. check and make sure the seat isn't loose in the block, and when your have compressed air in the cylinder the engine sometimes wants to turn a bit make sure its staying on TDC u may half to hold.
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Re: atv
#3 Jun 27, 2008 3:09 pm |
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Mech l dont see why that would'nt work. yeah just make sure u have a acceptable piston ring gap. |
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Re: engine won't run unless I pour gas in carb
#4 Jun 21, 2008 3:16 am |
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The two wires at the bottom of the carb bowl are for the anti-backfire solenoid which when u turn the ingition off it cuts power to the solenoid (which shuts the fuel off), so u need a multi meter to test if theres voltage at the solenoid when the key is in the on position (fuel is allowed to flow) ur going to need at the very least 10.5-11 volts if not more. its denfintly a fuel problem so l would check the solenoid first and if everything tests ok then make sure fuel is going from the tank to the carb, if ok dismantle the carb and inspect. oh yeah if u have voltage at the solenoid make sure u have a good ground. and when u checked for spark was the plug touching the block while cranking? good luck |
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Re: HomeMade chute controller
#5 Jun 20, 2008 3:23 am |
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denis u might be able to take standard metal throttle cable assembly on a snowblower/lawnmower and twist the handle side ways add a spring to pull it in and take a dremal tool and cut a bunch of slots in it, just a thought. good luck with it |
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