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AMC backfiring |
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AMC-304
AMC Apprentice Joined: Jul/08/2018 Location: Star, Idaho Status: Offline Points: 40 |
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I dont know exactly how old it is the boat is a 72 so u would assume it could be a 72... i could open it up and check....get it to tdc and check...
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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It's very easy to get #5 & #7 Switched... done it more than once... 1-8-4-3-6-5-7-2
Edited by PHAT69AMX - Jul/08/2018 at 10:36pm |
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AMC-304
AMC Apprentice Joined: Jul/08/2018 Location: Star, Idaho Status: Offline Points: 40 |
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Checked it and it is correct...could it be the carb??
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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A lean condition / lack of fuel, will / can, cause backfire & bucking etc... What Carb ?
But there is a Smokey Yunick saying... "90% of Carburetor problems are Ignition Problems..." or something like that... Modern blended fuels cause problems with rubber parts in Fuel Pumps (diaphragm) Fuel Lines, Carbs (accel pump diaphragm), etc
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gremlinsteve
AMC Addicted Joined: Dec/16/2008 Location: houston Status: Offline Points: 884 |
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Nylon gear teeth on the timing set broken I bet
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AMC-304
AMC Apprentice Joined: Jul/08/2018 Location: Star, Idaho Status: Offline Points: 40 |
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When pulling plugs, they are black so its rich, so it maybe the timing gears...??
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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Check to see that all the rocker arms are intact.
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Gremlin Dreams
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AMC-304
AMC Apprentice Joined: Jul/08/2018 Location: Star, Idaho Status: Offline Points: 40 |
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Yes all rocker are intact and very clean...
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AMC-304
AMC Apprentice Joined: Jul/08/2018 Location: Star, Idaho Status: Offline Points: 40 |
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So i guess the only thing left is the timing gears????
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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? Over tight Valves / Rockers ?... Wrong / too long Pushrods ?
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