Merc won't start

**silverside** · 04-13-2018, 09:28 PM

The motor is a 1983(ish) 9.8 Merc. Little use but has set for 15 years. Last year I ran it in a tub and worked fine. It has a new switch box, fuel tank and line, spark plugs. It is getting a good blue spark from both plugs. Fuel is getting to the carb. Plugs smell like fuel. What am I missing?

**Barnacle Bill** · 04-13-2018, 10:09 PM

Compression check? Try some 2 cycle starting fluid.

**silverside** · 04-13-2018, 10:30 PM

Did not do a compression check. I will tomorrow.

**CatFan** · 04-14-2018, 08:49 AM

Have any of those parts been changed since it last ran?

**silverside** · 04-14-2018, 09:24 AM

Originally Posted by CatFan

Have any of those parts been changed since it last ran?

Yes. The switch box is new but with the old one there was no spark. The new fixed that. Spark plugs also new.

**Fish on Line** · 04-14-2018, 10:59 AM

I would pull and clean the Carburetor .. When you ran it the last time it could have broke some trash loose and plugged the Jets. I found that using Acetone does an excellent job in dissolving old varnish in clogged ports and will not harm anything. It does a better job than cleaners sold for this purpose

**silverside** · 04-14-2018, 11:10 AM

Starting fluid did not fire it either

**scrat** · 04-14-2018, 11:59 AM

You need 3 thing 1. Fuel 2. spark(fire) 3. compression. With these something is suppose to happen anyway. Not saying that it will run good but you do have to have the 3.

**wannabe fisherman** · 04-14-2018, 12:24 PM

what about timing?? It could be firing at the wrong time

**Fish on Line** · 04-14-2018, 02:55 PM

Crossed plug wires

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