growling niose

[followme21]

I started my 1984 5.7 Mercriuser yesterday from storage.. It fired right up and ran fine.. The problem I had was the same problem I had last year, at higher R.P.M's (2000 or so) I can hear a growling or ginding noise coming from the rear. It does it with the prop engaged or disanged in forward or reverse. I had all the u-joints replaced 3 years ago as they were shot. Now it made this same noise last year for the first time after de-wintersizing I took the vent plug for the sten drive off and could hear a pressure release, (same thing this year) I toped it off with new oil.. maybe 50c.c and it didnt make that noise again all summer. Last night I did the same but have yet to start it as I am changing engine oil and belts,. will try again tonight. any thoughts as to what this noise could be?? thanks in advance

 

[IVAZ]

Re: growling niose

It sounds like it might be your gimbal bearing.

 

[Gary H NC]

Re: growling niose

Grease the bearing and change the drive oil...not just top it off..
The gimbal bearing,u-joints and upper gears all spin even if the boat is not in gear.
You want to change the gear lube to look for metal shavings...

 

[followme21]

Re: growling niose

approx how much grease does that hold? I am at work and my manual is at home and I want to take home the right amount.. Thanks again.