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09-16-2014, 04:55 AM #1New Member
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need help! Mercury 250hp v6 efi wont start when hot
Hello
I have a boat with twin 250hp efi 2stroke year 2000
one of the engines has some weird problems:
Starts OK when cold, but when the engine heats it only works on high rpm. maybe a little missfire or lack of power is noticed sometimes. If i lower the gas it shuts down and wont start until it has cooled down.
On random occasions i can make the engine start by pumping the gas and starting. then it idles very roughly like with only 5 cylinders, and smokes a lot.
Spark plugs are new, no water in filters.
using 98oct gas with mercury premium plus 2stroke oil
could it be the ign coils?
Thanks in advance.
,tuomas
Finland