force 125 only runs at 2000 rpms

[iwant2befishin]

force 125 model number 1251x6a fuel issue I think

Lake test number who knows at this point !!
on the boat ramp primed the bulb
quick start up to make sure it would start
backed in off the ramp turned around idled out and boat would never go over 2000 rpms.
then about a 100 yards out it died and would never start again. It would try to start but die out after a few seconds, I reached back and the bulb was not full, I primed it again and it would start for a few but wouldnt stay running. the lines and bulb are only a year old. thoughts ?????

 

[foodfisher]

Plugged fuel tank vent?

 

[Jiggz]

If priming keeps the motor running it indicates it is starving of fuel. And the most likely cause is either the fuel pump diaphragm if faulty or there is air leak in the fuel hoses or priming bulb check valve is faulty.

 

[iwant2befishin]

So now that I have looked it over it had a the fuel line was a little loose on both ends ( lord the little things) and the shifter when I put it back together was not engaging all the way. So now it starts right up runs for about 2 minutes and then dies. but starts right back up and same thing. Now keep in mind when we were messing with all this stuff I touched something and some smoke (small amount) came from one of the cdi boxes. Do you think this could be the problem?

 

[Jiggz]

Are you sure the motor is firing on all cylinders? Just to be sure do the drop cylinder test, i.e. while idling pull one plug cable at a time and listen for change in rpm. If there's a change it tells you that particular cylinder is firing. If there's no change then that cylinder is not firing and troubleshoot from there.

 

[jerryjerry05]

Outboardignitiondotcom has test procedures for your electrical components.

If the tank vent was clogged??
Then more than likely the squeezie would collapse?

Do a compression and spark test.
Test the overheat buzzer.
Key on.
Ground the orange lead in the wiring harness, that should make the buzzer sound off.
They are cheap and don't last forever.


The squeezie: it's only job is to draw fuel from the tank.
It pushes fuel into the carbs and fuel pump/s
Once the ball gets hard, then it's job is done.
When the motor starts and the fuel is being moved by the pump the ball should go soft and the
one way valve lets fuel flow with no restrictions.

Make sure the fuel line connections are tight.

 

[iwant2befishin]

guys thanks for all these great comments and I will start working back on it tomorrow night after work. Ok if I cant keep the motor running long enough to do these tests what would be the next best course. I had an idea of buying a gallon jug of sure gas that was already mixed and disconnecting the fuel line and checking that, if it stayed running then boom fuel problem, but if not then something else...is that a good idea or not?

 

[Jiggz]

If it can idle for at least a minute or two you should be able to do the drop cylinder test. You can try the portable gas tank but there's no need to buy the ready mix fuel. You can just get a two gallon jug and do a 50:1 fuel-oil mix with regular gas.

 

[iwant2befishin]

Jiggz while I look up the drop cylinder test what exactly is that

 

[Jiggz]

It's a diagnostic test to find out if the motor is firing on all cylinders. While idling, if you pull a spark plug wire (one at a time) and if that specific cylinder is firing, then the engine rpm will go down or will be lower. Even an unexperience person can tell when engine rpm drops.

If the said cylinder is not firing, then engine rpm will stay the same. That should give you something to focus on to further diagnose that specific cylinder on why it's not firing. And there's basically three requirements for a cylinder to fire, compression, fuel-oil-air mixture and finally a spark.

 

[iwant2befishin]

Jiggz, I found another post from like three years ago and this guy did almost a full rebuild on his force 125, but after all of it - it turned out to be the reeds. I really feel like its a fuel issue. I subscribed to the post so I could hopefully go back to it. There was alot of good info. That guy went all out..I really do appreciate all yalls help

 

[Jiggz]

Already then.