1988 85 force no power

[mauiboy]

I have a 1988 85 hp force pushing a 1988 bayliner My prob is that I have just above idle speed not enough to get on plane comp is 120 on all 3 cly. good gas new fuel pump I did notice that when i went to warm up the motor this morning it will idle fine but will not incress like it normaly should when you pull out the lever and push down on it. I am at a lost.

 

[my1stboat1]

Re: 1988 85 force no power

1st take your fuel tank cap off just as a precaution to make sure the tank is getting enough vent to allow fuel to get pushed through the motor... Then if that doesnt work and you did infact replace the fuel pump diaphram get the carbs rebuilt and cleaned.. while the carbs are off the engine remove the reed valve plate and check for broken reed valves.

 

[jason32038]

Re: 1988 85 force no power

Could be a spark problem. Dirty carbs or broken reeds. First and cheapest step would be to get a cheap spark tester and make sure you have spark on all cyls.

 

[mauiboy]

Re: 1988 85 force no power

thanks guys ill try that could it be a link and syinc prob

 

[mauiboy]

Re: 1988 85 force no power

I dont have a spark tester and did it the old way I pulled the top plug wire and the motor dog i then pulled the middle plug wire and the motor luged i the pulled the bottom plug wire and the motor stayed the same. my question is that could it be the coil?

 

[mauiboy]

Re: 1988 85 force no power

Happy Thanksgiving guys
So far this is what i did I switch the coils move the bottom coil to the top and moved the top to the bottom Still no spark at the Bottom plug. So it is not the coil right? what else do I need to do.

 

[CharlieB]

Re: 1988 85 force no power

If your system uses the two ignition boxes, switch the two boxes then recheck spark on all cyls.

If the dead cyl moves then one side of that box is bad.

 

[mauiboy]

Re: 1988 85 force no power

Thanks Charlie B
Ill try that, Do I move the wires around or do I have to move the pacs to. Is there a way to test the system withe out moving things around and how to do it

 

[CharlieB]

Re: 1988 85 force no power

Just swap the wires.

Notice that each box has the capability to fire two cyl's but the one box is only using one side.

Once you swap the connections and retest for spark, if the 'no spark' moves to one of the upper cyl's then you know that the one side of that box is bad.

You can reverse the pins in the wire connections for the 'single' box and run #3 off the other 'side'.

If still no fire on #3 then you need to continue testing the stator and trigger.

 

[mauiboy]

Re: 1988 85 force no power

Thanks Charlie
Ill try that as soon as it gets light out and will post up date

 

[mauiboy]

Re: 1988 85 force no power

Ok hears the deal I tried to switch 1 with # 3 pulled #1 and nothing motor sill ran the same pulled #3 and same deal pulled # 2 and the motor died.

 

[CharlieB]

Re: 1988 85 force no power

What I meant was to switch the wires from the stator and trigger, between the two boxes.

I don't remember if your model has the socket connectors or the terminal strip for all the stator,trigger, and coil wires.

If it is the strip then write down (draw a map) every wire, color, position, etc., so you can be sure to put everything back once finished testing.

Then retest for spark.

You do not need to start the motor.

Search the Merc outboard forums for Joe Reeves post on building your own (DIY) spark tester, using a block of wood and some nails.

Rig jumper wires from the plug wires to the tester. remove the spark plugs, it makes it easier on the starter and battery to crank the motor. observe the spark.

 

[mauiboy]

Re: 1988 85 force no power

Thanks Charlie B Ill do that some time over the weekend and get back to you

 

[mauiboy]

Re: 1988 85 force no power

A Big MAHALO (THANK YOU) T0 all who help me with my issues, it turned out that it was the pawer pack that was bad, I just installed the new one and now it fires on all 3 cly. I will take it out hopefully this weekend. Have a happy holidays.