4.3 Mercruiser noise

TMcLeod

Recruit
Joined
Jun 16, 2002
Messages
3
I have a 1995 Centery 18' bowrider with a 4.3 Mercruiser with a Alpha 1 outdrive. This year when we first put it in the water and started out it started making a viberating noise. Almost like something was striking the back of the boat. Once I got to about 5 to 10 miles per hour it stoped until I started to raise the foot to trim the boat out then it started again. It does't do it when boat is trimed out at higher speeds unless I adjust the trim. Also when it is making the noise I can turn the wheel and it will stop. It seems worse at low start off speed or when I try to adjust the foot up to plane out. The boat was only used about 4 times in the last 2 years. It has always run fine with no problems. I have had a hydrofoil stabilizer on it for about 4 years. Any ideas?
 

TMcLeod

Recruit
Joined
Jun 16, 2002
Messages
3
Re: 4.3 Mercruiser noise

OK How can you check and see if they are bad, and how hard are they to replace?
 

record hunter

Petty Officer 3rd Class
Joined
Apr 22, 2003
Messages
99
Re: 4.3 Mercruiser noise

I was thinking prob u joints also .You wont know until you take off your outdrive I was also thinking your motor is so far outof being lined up with your shaft but thats a long shot. Just remember its worse for your boat to not be used than to be used.you should have a manual and that will tell you how to remove your outdrive.
 
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