125hp Force outboard ignition troubles

ole glory

Recruit
Joined
Sep 15, 2005
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3
I have a friend that owns a 1988 125hp Force outboard. Long story short a mechanic came out on the boat Wednesdat night and mentioned while on the water that he thought that a cylinder was missing. Upon returning to the launch we loaded the boat and pulled out of the way. The mechanic then took out all his test equipment and sure enough one to two cylinders where bad. My friend is going to have a different mechanic troubleshoot the motor tommorow, but I had noticed something that made me concerned. While the cover was off the outboard on Wednesday, I noticed that next to each spark plug in yellow crayon was written 110. I am under the impression that this was mark for the last compression test. The book mentions that the compression should be between 135 and 165 psi. Is this a major problem? The new mechanic is going to test this first tommorow. What is to low for compression on this outboard? The motor has one blue and one black power pack on it. Which of these would be newer? There are two blue and two black coils (not exactly sure if that is what they are called), again which would indicate the newer? Any help as to the reason why this one to two cylinders would be bad and what troubleshooting to complete to find out would be greatly appreciated for tommorow. Thank you<br /><br />Ray
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,759
Re: 125hp Force outboard ignition troubles

Ideally the compression would be higher, but motors get old and wear and rings stick.<br /> It should run fine with only 110# compression.<br /><br />I have never seen a motor run propperly with a mixture of the blue and the black ignition systems. The general rule is "don't mix the two."<br />The blue ones are older.<br />The black ones are newer.
 

ole glory

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Sep 15, 2005
Messages
3
Re: 125hp Force outboard ignition troubles

roscoe, The owner has ordered all coils and power packs of one type. We are hoping that this will help. Thank you.<br /><br />Ray
 

BlueShadow

Cadet
Joined
Jun 28, 2005
Messages
8
Re: 125hp Force outboard ignition troubles

I'm having the same problem on my 1991 120hp force motor. After mechanic replace the coil/powerpack it did not solve the problem so he did another test and the problem came out to be the switch box. He is looking for one right now but haven't found one yet.
 

BlueShadow

Cadet
Joined
Jun 28, 2005
Messages
8
Re: 125hp Force outboard ignition troubles

Isn't switch box a Power Packs?. isn't it the same thing? sorry for the noob question
 
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