Mercury force 150 no fire

[Craigs1904]

First off if this is in wrong area miss feel free to move.. so I got this boat and I'm new to boats periord... it don't fire.. from what I'm reading it's the stator.. it has a new battery so I know it's turning fast enough to fire.. can someone tell me which wires to rest to make sure it's stator? There is several wires and I want to make sure I know which ones.. there seems to be a couple different power blocks as I call them where wires or connected to... please help lol

 

[Craigs1904]

Oh.. this is a 1990

 

[jerryjerry05]

The kill switch hooked up?(had to ask)
If it's not on right it won't work.
​You do a spark test with a spark tester?
​Anyone do any recent repairs?

​outboardignition.com has test procedures for your motor.
You have the Prestolite system.

 

[Craigs1904]

Ok I'm not sure how the kill switch works.. looks like maybe it was type that attaches to you and if pulled it kills.... it's there I even tried pushing in while starting.. I just grounded a plug and looked for spark.. as far as recent repairs.. I just got it and I don't know for sure.. but I don't think.. way i took it it's set for a year

 

[jerryjerry05]

Look up outboardboardignition and do the tests for your motor.
Where you located?

 

[pnwboat]

Need to know which ignition system you have.

Do you have 5 Sky Blue coils and 3 Sky Blue CD Modules ( this is the Prestolite ignition system).

Do you have 5 Dark Blue almost Black coils with a Switch Box (this is the Mercury Thunder Bolt ignition system).

 

[Craigs1904]

I'll take a look... I don't know anything about boats lol.. I'm in Washington court house ohio

 

[Craigs1904]

I have 5 sky blue coils and 3 cdi

 

[Craigs1904]

Where's the kill wire?

 

[pnwboat]

OK so you have the Prestolite ignition system. Each of the 3 CD Modules has a white wire coming out of it. That is the Kill Circuit.

To stop the engine, when you turn the ignition switch to the OFF position, the three white wires are shorted to ground. All three white wires go to the terminal strip on the left side of the motor looking forward. Disconnect those three White wires and this will disable the ignition Kill circuit. Check for spark at each plug. If you get spark, then you either have a bad Kill Switch which is usually located on the dash or Throttle control handle, might have a switch that says "RUN"/"OFF", or a problem in the wiring harness, or someone has wired the ignition switch wrong.

NOTE: If the motor starts with the Kill circuit disabled, you will not be able to shut the motor off with the ignition switch. To stop the motor, either engage the choke or take your hand and cover the carburetor throttle openings to flood the motor and it will stop.

 

[Craigs1904]

Could I group d one of the white wires to shut it off?

 

[pnwboat]

Yes you can tie all three wires together and if it starts (hopefully), just hold the wires to ground and it will kill the spark.

One thing I forgot to mention. Before you get too deep into the motor ignition issues, perform a compression test. This will tell you if the rings and cylinder walls are in good shape. If you have low or no compression, you need to decide if you want to spend the time and money into possibly having to replacing a head gasket, or maybe piston(s), or worse case scenario.....a possible motor re-build. Just something to think about.

 

[Craigs1904]

Seems to be two white wires from each box

 

[Craigs1904]

This is what I found in my book... according to this.. they are not in the right spot... also I'm not sure where the yellow jumper wire came from or why.. anyone have any info? Would this cause no spark or not firing in right order

 

[Craigs1904]

Any help?

 

[jerryjerry05]

Contact Mercury Marine tech line.
They still answer the hard to figure stuff?

 

[Craigs1904]

I'm not sure.. are you saying they do or asking lol

 

[jerryjerry05]

They do answer the tuff ones.

 

[Craigs1904]

Ok I will have to give it a shot

 

[Craigs1904]

Anyone else have any info? I havn t got a chance to get a hold of anyone from mercury yet