cutting new hole in transom for a merc

[dstew8]

i am restoreing a 1966 donzi in got a newer motor and outdrive for it 1984 350 merc i have replaced the wood and reglassed the transom but need so help in figuering out there to cut the hole and aling the motor on the stringers for hight
Doug

 

[Spinnaker]

Re: cutting new hole in transom for a merc

i am restoreing a 1966 donzi in got a newer motor and outdrive for it 1984 350 merc i have replaced the wood and reglassed the transom but need so help in figuering out there to cut the hole and aling the motor on the stringers for hight
Doug

You need to get a Merc cut-out template. It should have the measurements for placing the template on the transom. After that the alignment is done with an alignment tool when your transom plate, gimble housing are installed.
If memory serves me right there are some threads on the subject regarding that cutout and template. Search in the Merc forums.

 

[oops!]

Re: cutting new hole in transom for a merc

as well as what spinnaker said......

did you keep the stiringers and the motor mount area the same height?.....if not, you have a slight adjustment in the isolators that attach and support the motor mounts from the stringer/mount height.

if you made a mistake, and made the mount base too high.......different isolators or motor mounts can be used......however to find the correct combination, means lifting the motor....trying different mounts with different isolators and vise versa a bazillion times.....each time you try.....you MUST USE THE ALLINGMENT BAR....not good if your paying shop charges

good luck.
oops

 

[oops!]

Re: cutting new hole in transom for a merc

by the way......


welcome to i boats.!
we would love to see pics of the donzi and what work you have done...please share it with us.

read the hull extension thread for detailed pictures of a transom plate cut out for an alpha merc drive.

cheers
oops

 

[Bob_VT]

Re: cutting new hole in transom for a merc

Welcome to iboats!

Take a look at this post http://forums.iboats.com/showthread.php?p=1693398#post 1693398 and you can download a manual for your mercruiser which should include the mounting dimensions.

 

[Bondo]

Re: cutting new hole in transom for a merc

i am restoreing a 1966 donzi in got a newer motor and outdrive for it 1984 350 merc i have replaced the wood and reglassed the transom but need so help in figuering out there to cut the hole and aling the motor on the stringers for hight
Doug

Ayuh,... Hi Doug, Welcome Aboard....

What did this barge have for power Before you started,..??
Did you fully glass over whatever cut out was in the transom glass,..??

 

[dstew8]

Re: cutting new hole in transom for a merc

the motor was out when i got the boat but rebuild 302 ,i took out the old wood on the transom and stringers and glassed over all of if

 

[Bondo]

Re: cutting new hole in transom for a merc

Ayuh,... My question is, Is the original cut-out still in the glass, OUTSIDE the transom,..??

If So,... Use it to cut the New 1...
The Center cut out will be the Same, as should the lower bolt holes, although the bolt holes should be verified...

 

[dstew8]

Re: cutting new hole in transom for a merc

i am changing from a Eaton to a merc ,i have fix the glass on the outside ,i have the boat i got the merc out of so i am going to make a template from it ,then put the transom plate and the rest of out drive on temp. to figure out how high to make the top of stringer for motor mounts