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KDG
03-14-2004, 03:10 PM
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Would anyone be able to assist with the interpretation of a identification tag found on the bell housing of my 1966 triple hatch 18' ? The engine was changed to a 1975 351 windsor a while back prior to my acquiring the boat, but they kept what apperas to be the original aluminum bell housing that includes the following data:

S/N D9HM-3637-1-RW-I/O

CPM-235-4V 66HM MB1

CR 9.3:1 T1M12

It also reads olman Moody (these letters appers to be black ink/dye/paimt and are missing the H for Holman however, the base of the tag includes Holman & Moody, Charlotte, NC.

I figure that the Serial Number (S/N) uses the D for Donzi and the I/O stands for the type of drive unit. The drive on the boat is a 250 series Volvo Penta.

The 235-4V may mean the engine was a 235 HP with a 4 barrel carb. The 66 probably means the year. The CR may be the compression ratio of 9.3:1.

I would appreciate any assistance you can offer.

Thank You

mattyboy
03-15-2004, 12:06 PM
KDG,
here is my h/m registration
i think the rw io is rework outdrive being a 66 your boat was probably an eaton boat has well and the tim12 is timing
hope that helps

matty

KDG
03-15-2004, 04:22 PM
KDG,
here is my h/m registration
i think the rw io is rework outdrive being a 66 your boat was probably an eaton boat has well and the tim12 is timing
hope that helps

matty

Matty:

Thanks for the information. Mine was probably once a 289 with an Eaton Drive as well like you mentioned. Did a lot of folks who had 289's decide to upgrade to the 351 Windsor as they may have wasted the old motor, just wanted more power, or maybe both?

Thanks again for the help.

Kurt

mattyboy
03-15-2004, 08:16 PM
think it was more to get rid of the eaton, but if you can get more hp also why not


Matty

v-drive
03-15-2004, 10:44 PM
Back in 1992 I wrote holman moody and asked them to break down my engine number and they sent the following information. A0 HM 1004 1 RW Z
AO=1970 HM=holman moody manufactured
1004=one thousand series indicate 427 c.i.d. (4=fourth unit built)
1=standard automobile rotation
RW=raw water cooled
Z= warner transmisson
I also asked about the number of 427 engines that were used in DONZI boats. The reply was that they only had records for 1969 and 1970. In 1969 they shipped (3) 427 engines. In 1970 they shipped (5) 427 engines and (2) were converted from 300 horse to 400 horse. They also stated that they didn't use the 427 much after 1968 unless it was special ordered. If anyone has any interest in this information I can mail you a copy of this letter.

KDG
03-16-2004, 03:13 PM
Back in 1992 I wrote holman moody and asked them to break down my engine number and they sent the following information. A0 HM 1004 1 RW Z
AO=1970 HM=holman moody manufactured
1004=one thousand series indicate 427 c.i.d. (4=fourth unit built)
1=standard automobile rotation
RW=raw water cooled
Z= warner transmisson
I also asked about the number of 427 engines that were used in DONZI boats. The reply was that they only had records for 1969 and 1970. In 1969 they shipped (3) 427 engines. In 1970 they shipped (5) 427 engines and (2) were converted from 300 horse to 400 horse. They also stated that they didn't use the 427 much after 1968 unless it was special ordered. If anyone has any interest in this information I can mail you a copy of this letter.

Thanks for the infomation. I'll contact Holman Moody and see if they can do the same for me.

Best Regards,

Kurt

mattyboy
03-16-2004, 05:58 PM
vdrive,
great info thanks

Matty