75hp Mariner bogs down during acceleration

[DDRoberts]

I have a 75 hp Mariner --year is between 1984 and 1986. When I hit approx half throttle to jump on plane, the motor will bog down and almost shut off. If I pull back up on shifter, motor will come back. I have rebuilt the fuel pump, carbs, replaced plugs and wires, and all fuel lines. I am at a loss as where to look next.

 

[racerone]

Try opening low speed nixture 1/8 turn on all 3 and try again.--------Check compression ?

 

[racerone]

Try opening low speed nixture 1/8 turn on all carburetors and try again.--------Check compression ?

 

[DDRoberts]

Low speed works fine--high speed is my problem. Also good compression across all cylinders. Some else said it had a trigger that had a low and high?

 

[racerone]

These motors will idle just fine.----Then on acceleration they will bogg down.--One cure is to open the low speed mixture needles 1/8 turn at a time to see if problem goes away.

 

[DDRoberts]

I'll give it a try next time I take it out. Thanks

 

[DDRoberts]

Just ran out to look at my carbs--only 1 needle. So now what? I've tried adjusting that one.