Re: 15 Hp Force will start on one cyl. only

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Posted by Spike ( on June 08, 2005 at 16:23:09:

In Reply to: 15 Hp Force will start on one cyl. only posted by Tracy on June 08, 2005 at 13:03:19:

Pull the plugs and check the compression.Should be 100 lbs and within 10% cylinder to cylinder.
If it checks out Check the spark.You may find no spark on the top cylinder.Double check your carb to be sure the float is working properly.
The outboard is no mystery the carb provides a fuel air mix which passes through the crankcase to the piston.The oil lubes the engine as the fuel mix passes through. Every time the piston comes up it fires.The piston covers and ucovers intake and exhaust ports as it cycles.The ignition is similar to that on a lawnmower.
2 Cycle design is usually explained in the front of most repair manuals.

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