Mercury 90hp not starting

[wan]

hay everybody, thanks in advance for the help and support.
Well here is some information about it.
90hp, 3 cylinders (serial no 9740819) have three carburators. I do not know how old it is, but it looks old. The machine has a key and an electric choke. It was starting fine. Then, it is ideling but not starting eventhough the choke is clincking.
I put new battery and spark plugs with no luck.
May be the flywheel have sliped, how do I know. Will the carborator cleaning help. How do I know that the starter is ok eventhough it is kicking the flywheel.

 

[JB]

Re: Mercury 90hp not starting

Go to the Engine FAQs and do the troubleshooting in "Outboard won't start". Let us know what you find.

 

[wan]

Re: Mercury 90hp not starting

I do thank you JB. Please bare with me because my know how about this machine is minimal. I already searched the forum in the morning, and found helpfull information that I tryed. Here is what I did.

Opened the air cover behind the carburators, and found that the floats may be called (vertical round brass peices) are stuck closed in all the three carbs, is it normal. I pumbed some fuel, saw it flowing through the first filter, but didn't see it coming from the nossells. I put about 3ml of mixed oil/fuel into the carbs tryed to start it, but it didn't.

Removed the spark plugs sprayed about 3ml of mixed oil/fuel into each hall reintalled the plugs and wires, fired the babe and it started normally. Tryed to fire her again with no lock.

 

[wan]

Re: Mercury 90hp not starting

Hi finally it started and went fishing. I did put abit of carburator sparay cleaner into the carb nozels, waited for a while then started it. It backfired a little bit, shut it off and started it again, it started fine. Thanks JB.

 

[boatradioman]

Re: Mercury 90hp not starting

you may need to get different spark plugs.I would recommend taking your boat in for repairs.