Lost power in 76 evinrude 70hp

[leach]

"was at the lake on saturday e

"was at the lake on saturday engine ran fine did about 25 to 27 mph. on sunday a different story boat started fine and ran fine but would only go about 12 mph. went out again on monday night boat still only ran 12 mph. speed-o works fine i have no tach, thinking i should check compression is there anything else that it could be??"

 

[jwbmarine]

"ck the spark,on ea cyl..most

"ck the spark,on ea cyl..most likely u have a bad pwr pack.."

 

[joereeves]

"Ck Comp.... should be 100&#43

"Ck Comp.... should be 100+ psi and even on all cyls.

Ck Spark.... Should jump 7/16" gap with hot spark, a real SNAP!

If above is okay, clean carburetors."

 

[jwbmarine]

"ck while doing spark test,...

"ck while doing spark test,....that u have no CRACKED/arcing ign coils.."

 

[leach]

could a half plugged fuel filt

could a half plugged fuel filter and a cut plug wire be my root cause??? found these problems on visual inspect today because it is the first chance that i have had to look at the motor!!!