Re: 1969 johnson 9.5 cutting out
If you are running this motor in a barrel it is probably inhaling its own exhaust. These motors sit low in the barrel and are also prone to exhaust leak
-----Have a fan blowing close by to help prevent the motor from inhaling its own exhaust. The 9.5hp sits low in the barrel so it is more prone to inhaling its own exhaust and running poorly. ( Try taking the motor cover off as well) If your motor runs better then you may have a exhaust leak)
The below attachment is the known 3 areas of exhaust leaks with this make and series of motor.
4th area of exhaust leak come from the parts 6 and 7 in the diagram below.
Couple of things to think about.
- is that fuel old....has it been sitting around for a while? Might want to mix a fresh batch of fuel/oil (50:1) ratio. (old fuel in the tanks may accumulate water and will cause your motor to run like crap!!)
mix 8 ounces of TWC-3 oil 2cycle oil with 3 gallons of gas.
- Make sure the air vent cap is open on the tank if is plastic tank. If the cap is closed it does not allow air in the the tank and it creates a negative pressure in the tank. The created negative pressure makes a hell of a job for the fuel pump to get fuel from the tank to the carb. (We have all done this....even though we don't like to admit it...lol) This situation can certain make your engine run very poorly.
- Make sure the primer bulb on the fuel line is connected to the tank and not the motor (the arrow on the bulb should be pointing to the motor and that is the direction of the fuel flow)
- Squeeze the the primer bulb on the fuel line until it is somewhat firm.
- Also if does not seem like the motor is getting enough fuel, then the fuel pump may be bad, so try pumping the bulb while it is running and if the running condition improves then that is a big clue.
**Try raising the tank above the level of the motor with something (stable) and that will allow fuel to be delivered by gravity. (Another clue your fuel pump might be bad)
** Check your fuel lines (in the motor housing and from the tank to the motor) to make sure they are not hard, brittle, or compromised and allowing air in the system.
If all fails then you may have to revisit your carb and recheck your float level and also check that float level is correct.
Good luck.
