I just checked the compression on the motor it was 96,95,94,&95 what is suposed to be.
P penrosefred Cadet Joined Nov 8, 2007 Messages 8 Nov 24, 2007 #1 I just checked the compression on the motor it was 96,95,94,&95 what is suposed to be.
HighTrim Supreme Mariner Joined Jun 21, 2007 Messages 10,486 Nov 24, 2007 #2 Re: 1977 Johnson 85hp What is important is that the cylinders are even and within 10 percent of each other, which yours are, so I wouldnt worry. All gauges are different and read differently. The temp of the motor when tested also changes the readings.
Re: 1977 Johnson 85hp What is important is that the cylinders are even and within 10 percent of each other, which yours are, so I wouldnt worry. All gauges are different and read differently. The temp of the motor when tested also changes the readings.
tashasdaddy Honorary Moderator Emeritus Joined Nov 11, 2005 Messages 51,019 Nov 24, 2007 #3 Re: 1977 Johnson 85hp as said above, do a decarb.
