Viabrating Damper on 140 Mercruiser

[lenny2113]

When my engine is running, you could visually see a "side to side" viabration of the damper. This causes the engine to viabrate excessively. <br />It is a 1988 3.0 Mercruiser engine. <br />Should I change the damper? <br />How involved is the repair?<br /><br />Thanks.

 

[akriverrat]

Re: Viabrating Damper on 140 Mercruiser

could be the damper or could be crank bearings. how is the oil pressure?

 

[lenny2113]

Re: Viabrating Damper on 140 Mercruiser

Oil pressure is around 40psi. I think it is within normal range.

 

[akriverrat]

Re: Viabrating Damper on 140 Mercruiser

damper is generaly pretty tight fit on crank. if outer ring has come loose i wouldn't run it. that ring coming off at high rpm can be just too exciting. remove pulley, remove crank bolt, attach a puller and pull it off is the usual procedure. never done it on a 3.0 nor do i know what might be in the way like a motor mount. don't hammer on it putting it back on. that can damage the outer ring. good luck.