Question about Boating
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Posted on Jan 02, 2017
If the fuel was not treated with a fuel stabilizer than you probably have a varnish build up in the carburetor. This varnish will clog fuel needle valves and jets. You need to disassemble the carb to clean the jets and needle valves. Sometimes cleaner is not enough you need to us compressed air to blow out the jets. Good luck.
Posted on May 13, 2009
SOURCE: 1986 9.9 Mercury Outboard Motor
Check plug wire first-- replace if bad. See if contact in plug cap is corroded. Use some Dielectric Contact Grease in the spark plug cap-- this will ensure good contact.
Also check kill wires that travel to tiller. They often get broken internally or get shorted out as they enter the housing engine.
These are the most obvious and easiest to fix. Your intermittent probem sounds like one of these issues (I used to have this same engine and had both problems)
Posted on May 17, 2009
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