My Honda Shadow Aero 750 has fuel coming out of hole in bottom of petcock / tap when cranking engine and of course more when it is running. Is this the result of a bad petcock diaphram?
My problem was the diaphram. Replacing just the diaphram and not the assembly saved me 80%.
No more solutions necessary please.My problem was the diaphram. Replacing just the diaphram and not the assembly saved me 80%.
No more solutions necessary please.
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1
Park the Honda Foreman on flat ground and leave the engine
running for 5 minutes to allow the engine to warm up. Place the oil
drain pan under the crank case drain plug. Turn the engine off.
2
Remove the drain plug from the under side of the crank case
using the ratchet set. Allow the engine oil to drain into the oil pan.
Replace the plug to the bottom of the crank case and tighten the plug
using the ratchet set.
3
Remove the small screw from the side of the crank case using
the Allen wrench. Remove the cap labeled "OIL" from the top of the
crank case. Insert the funnel into the hole where the oil cap was.
4
Pour Honda 4-stroke engine oil into the funnel until the oil
starts to come out of the hole where the small screw was on the side of
the crank case. Once the oil starts to come out of the hole, stop
pouring and replace the screw. Remove the funnel and replace the oil cap
to the top of the crank case.
Drain the tank. You should be able to remove the petcock by simply turning the nut holding it on or turning the whole petcock assembly. It may be stuck in place by the o-ring/fuel filter inserted into the tank. Be sure the filter is in place when you put the petcock back on or you will have problems with leaking gas out the carburetor overflows (from tank rust getting into the carburetors). Chances are the leaking gas is not form the tank sealing o-ring, but from the vacuum diaphragm assembly attached to the back of the petcock. Part # 5 on the microfiche.
http://www.bikebandit.com/houseofmotorcycles/2004-honda-vt750c-shadow-aero/o/m2881#sch407448
It is always a good idea to always turn your gas off when not riding. This condition can happen with any bike, even new ones. Did you change your oil after it happened? After the engine has been flooded it is important to check the oil and change it if fouled with gas. If the oil reads higher than it should it is full of gas and will no longer lubricate your motor properly. If you have a vacuum operated fuel petcock and the vacuum diaphragm gets a hole in it, it can be the cause of the engine flooding with gas. Check the fuel petcock for damage and repair it with a K&L kit or a new assembly from Honda.
Thanks for your reply. I noticed a bubble in the diaphram inside the petcock cover assembly. I replaced just the assembly and have no more gas leak.
My problem was the diaphram. Replacing just the diaphram and not the assembly saved me 80%.
No more solutions necessary please.
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