Mercury Force 120 HP wont start

[djockey21]

I was out on the lake a few weeks ago and everything was working fine. The last time I turned off the engine to pull in the tube and the boat would not crank back up. I thought I had ran out of gas because my needle was close to E. I put gas in the boat and tried to crank it last night and still nothing. I got spark to the plugs and I tested this by pulling them all out and putting close to the engine head and I can see spark. I was able to get it to fire two times today but it was shut off. I took the carbs off and cleaned them. I also put 2 new/used carbs on and still nothing. I seem to be getting fuel to the carbs but that is it. I am at a loss here. I thought about spraying fuel into the spark plug holes to see at least see if it will try to start because I think this will at least give me something to work with like fuel not getting to head.

Any ideas are appreicated.

 

[Fun Times]

Hi there, lets move your inquiry over to the Force sub-forum to see if it will help at all as we have some talented members in here but in the mean time you may want to try performing a cylinder compression test to ensure you don't have a head gasket failure or something further down inside the engine....Hoping not so good luck.

 

[pnwboat]

Yes definitely do like Fun Times suggested and perform a compression check. Also would be helpful to let us know what year the motor is.