Reply To: Rd 15 Compression

[olcah]

I would remove the gearbox as the new impeller is probably dragging.  When gearbox is off the motor, the driveshaft should protrude from the gearbox.   Try to turn the driveshaft.  If it is tight you will see if the impeller is dragging.   If the motor turns easier  I would put a compression gage on and determine each cylinder’s compression.  My 1954 Johnson 25 had compression in the 90’s to low 100s.

A normal person should be able to pull the motor over with the plugs in.  It will be easier when the motor is on the boat.