Tuesday 5 July 2011

Fixing a Parsun F5BMS 4-Stroke Outboard Motor

In May 2009, I bought a Parsun model F5BMS 5 hp outboard motor. The motor ran fine for about 7 hours. At 8 hours of use, it began to stall at idle. Not long after that it refused to start.

The motor sat unused in the garage for two years (more on the reasons in another post) until this week (July 2011) when I discovered a technical service bulletin from a Canadian Parsun distributor concerning thes Parsun 5 hp outboard filter:

PROBLEM
Due to engine vibrations, the filter, under the gas tank, can move down in the gasoline tube in some cases. It may reduce the gasoline flow and sometimes it can stop the engine.

It was a very lame engineering mistake. The tiny filter at the bottom of the internal gas tank slips down into the fuel line and blocks the flow of gasoline.

SOLUTION
In order to fix the problem, remove the tube from the tank and push the filter inside the tube.
Then, set the tube in place.


In my case, I just pulled off the fuel line, fished the tiny filter out of the line, and re-attached the hose to the internal tank. There's already an inline filter on the motor, so there's no need to take a chance on the stupid little tank filter leaving me stranded again.

Here's some French text for those searching Google for Parsun en français : Arrêt du moteur hors-bord PARSUN 5hp

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