vapor lock
#2
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Join Date: Apr 2009
Location: Sachse, Tx
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Fuel-injected or carb ?
Ethanol-based fuel being used or not ?
A carb engine usually has enough fuel in the bowl to restart again. Fuel-injected engines without water-cooled fuel rails WILL have the problem. (Ethanol boils at 87 deg F)
I was experiencing vapor lock on my Merc 5.7 fuel-injected engines because of using Ethanol fuels. Switched to non-Ethanol fuels and problem went away.
Ethanol-based fuel being used or not ?
A carb engine usually has enough fuel in the bowl to restart again. Fuel-injected engines without water-cooled fuel rails WILL have the problem. (Ethanol boils at 87 deg F)
I was experiencing vapor lock on my Merc 5.7 fuel-injected engines because of using Ethanol fuels. Switched to non-Ethanol fuels and problem went away.
#5
Offshore Cowboy
Platinum Member
this works 100% of the time on the 525's, 600's and 700's. It's a bit trickier on the 850's & 1075's, but does work w/ them also... and is much easier than pulling out the wrenches and releasing the pressure lock in the line.
Hope that helps.
PS: and yes, letting it idle before shutting down certainly helps.