Merc 402 died

[pocale]

Yesterday, i was cruising about full throttle for a 10mins, then turned the power-lever to decelerate to about 1/5 throttle, but the engine died the same. And would not start anymore... when cranking, sometime it fires once, but would not start.

I had a quite similar two weeks ago, when stopped for fishing the engine died when decelating, but after the 1h fishing session the engine would start after a couple of minutes cranking.

Why it runs good for full throttle and decelaration kills it?

Cold engine has always required quite a long cranking time before starting, warm engine instant start. Might be some fuel problem... where is the fuel pump located and how could i test it...
is there any inline built in filters anywhere before carburator? should i pull the carb off?

thanks for any help.

 

[bktheking]

Re: Merc 402 died

Fuel pump has nothing to do with starting, fuel pump pump's fuel into the carb once running. Pumping the carb full of gas for cold start and a good working choke with a warm up lever starts a motor. Sounds like you have 2 problems going on. Warm engine- instant start is because it's warm, there's no filter unless you put one on. If it's the side bowl style carb there is a screen under the tower on the side of the carb, where the gas line goes in to the carb. I'd start by rebuilding the carb and see if the issue goes away.

A year or SN would help.