Stumped

[Stetson17]

I have a 1989 Evinrude 70 hp, 3 cyl, that runs like it is in slow mode. Is not overheating, 135 degrees Fahrenheit, alarm system works good if temperature sensor is grounded. I have disconnected tan wire to sensor and power pack with no change in how it runs. Firing on all three cylinders good with about 125 lbs compression on each cylinder. Carbs have been rebuilt and cleaned. New fuel pump and primer bulb, tried pumping bulb while running with no change in performance. I've gone through and checked reads, no damage or cracks.
I'm completely stumped, thanks for any help

 

[Stetson17]

I forgot, model is a E70TLCEM.

 

[racerone]

Perhaps check if a cylinder sleeve has rotated.

 

[Bosunsmate]

Hows the sparkplugs look?

 

[jakedaawg]

How confident are you that you actually got all the little orifices removed and cleaned in carb?

spray fuel mix directly into carbs while running after verifying that carbs are open all the way...

also, what color stripe is on the orange wire going to the top coil?

 

[Stetson17]

It has New spark plugs. Carbs were completely taken apart, every orifice cleaned I'm sure, the top coil has a blue stripe. Not sure about rotated cylinder sleeve, what would cause that?

 

[jakedaawg]

Have you checked the timing? Is the time base moving? Factory manual has the synch and link.

 

[Stetson17]

Should I have 12V on the tan wire at temp sensor and tan wire going to power pack

 

[Stetson17]

I figured out the problem. The alarm horn shorted and sent 12V to the power pack causing it to short and stay in slow mode. Had a spare power pack so replaced it, left tan wire to power pack disconnected, took it to lake and runs great.
thanks for help and suggestions