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16 Posts
Discussion Starter · #1 ·
Took my 2014 3UP out for first time post-winterizing by dealer.
Engine runs smooth but throttle uneven. Sudden deceleration at high throttle
Sudden acceleration when just trolling at 5 mph.
No check engine lights on and when it did accelerate is had plenty of giddyup.

Let it rest for the night.
Next day no such symptoms
but now acceleration is a real dog and top speed not close to being hit.
Speedometer is off too. It says about 25-30 mph at full bore and I estimate I'm only going about 37-38 when it should be up at 50mph
I feel like the engine is fine but the ecm might be messing with me. Any idea?
dazed and confused

Premium Member
85 Posts
I'd recommend replacing the spark plugs and checking the connectors going to the ignition coils/spark plug caps. You could have fouled a spark plug if your dealer fogged the engine during the winterization process.
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