1987 alpha one 175 noise coming from bellhousing

[Clarko1988]

I have a video of it it's comes and goes. When I accelerate it get quieter. Mainly does it at idle.

 

[Clarko1988]

It is a brand new 4.3 vortec.

 

[Bt Doctur]

If brand new,take it back to the dealer

 

[Clarko1988]

It's not the motor it is coming from the bell housing area also I just bought the motor was not from a dealer

 

[Bt Doctur]

remove the drive and retest

 

[Clarko1988]

remove the drive and retest

It dawned on me that when I took the motor out there where wood spacers under the front motor mounts that I forgot to put back in...could out of alignment cause this?

 

[Rick Stephens]

Checking alignment is an annual maintenance requirement. Checking it every time you pull the drive is a must. Not checking it when you swap motors is like not bothering to put oil in the motor.

 

[Clarko1988]

It's a new to me boat...

 

[Scott Danforth]

It's a new to me boat...

so, you swapped the motor?

did you align the motor? if not, pull the drive and align the motor.

 

[Clarko1988]

I took out drive off and it still makes the noise

 

[Rick Stephens]

I took out drive off and it still makes the noise

Pull the motor back out and find the problem.

 

[Clarko1988]

Soo when I turn the motor off it makes a knock/ping.

 

[Clarko1988]

I

Pull the motor back out and find the problem.

Pulled the motor checked the flywheel torqued everything. Can't seem to find the problem.

 

[Scott Danforth]

I

Pulled the motor checked the flywheel torqued everything. Can't seem to find the problem.

you did pull the drive first, then re-align the motor and check the gimbal bearing and u-joints before putting the drive back in, correct?

 

[Clarko1988]

I have the drive off and it still makes the noise

 

[tank1949]

It dawned on me that when I took the motor out there where wood spacers under the front motor mounts that I forgot to put back in...could out of alignment cause this?

Ouch! I assume you pulled and installed new motor? I saw shims on old OMC drives years ago but not on MC, yet. That's new to me. Pull drive and check for alignment, gimbal bearing roughness and then u-joints. Pray you didn't damage coupler or spine teeth. Crank motor w/o drive attached. You will have to use garden water hose and jurry rig supplying water. If no noise before re-installing drive, pray noise is not in OD gears. You will know soon enough. Good luck!