1975 Jonhson 50 hp

[sajetos]

Hello!!!

I have a 1975 Jonhson 50 hp, and the motor I think have a problem. When the motor goes to the max speed has like a inyection cut. The gasoline filter its new and the spark plugs.

what could be the problem?

I have two videos:

http://www.youtube.com/watch?v=qG-uvSKUt0o
http://www.youtube.com/watch?v=_5K5TSkhmg8

Best regards.

 

[racerone]

Use a timing light to determine which cylinder has the failing ignition.------Then you can do more trouble shooting.