1993 V76 250HP Hard Starting Problem

[dlrfish]

I rebuilt all six carburators. They don't have choke butterflys. If we put hands over the carbs to flood each one it will start and run.After first starting it starts fine. What can I look for?

 

[qhn]

Too much air mixture is the minor issue. Head gasket is the bigger issue. It needs more fuel in the combustion chamber to fire up. Once you started it, rev it up and test the primer bulb to see if it's soft. If so, fuel diaphragm is ruptured/bad.

Basic diagnostic starts with compression, spark and fuel/air mixture.

Good luck.

 

[dlrfish]

I have now changed head gaskets and still have a starting problem. It seems to me that if this engine had a standard choke set up every thing would be fine. Once the engine has been started and run to operating tempature it starts fine there after.

 

[Vinh]

Klrfish,
If it doesn't have the choke butterfly then it should have a fuel enrichener instead. There should be another small fuel lines going to the carbs. These fuel lines are controlled by an electronic valve. This is your choke BTW. When you press the choke it opens the valve and allow more fuel going to the carbs. GL.

 

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