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11-17-2005, 01:49 AM
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#1
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Registered
Join Date: Jan 2005
Location: Hurley,MS
Posts: 37
1978, SeaCraft, Seavette
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TRS/ Trans years?
Does anyone know what years that Mercruiser used the MerCtrans II and what years were the B/W trans used? The reason why I ask is my engine is a 420 HP 454, which from what I understand was produced 87-89. The trans that I have is the MerCtrans II. And from what I can gather, Mercruiser went from the Mer trans to the B/W before 87. The boat is a 78. So is this the correct trans for this year model engine? The only serial # that I have found is on the top of the bell housing. The serial # is 0014128, model # MOM-E.
Thanks
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11-17-2005, 10:23 AM
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#2
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Registered
Join Date: Feb 2002
Location: Honeoye, NY
Posts: 763
'77 Martini 7 Meter
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Re: TRS/ Trans years?
MerCtrans was used by Merc. mostly with small block Chevs. and 330 HP big blocks through the late 70's and into the early 80's. I have never seen the factory package that Cyclone 420 with the MerCtrans. (although I can't swear that it NEVER happened) My guess is that the transmission is probably what came with the boat but the engine was upgraded somewhere along the line. --- Jer
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11-17-2005, 10:46 AM
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#3
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Charter Member #232
 Charter Member
Join Date: Oct 2000
Location: Manchester, MA USA
Posts: 17,516
1979 Formula 302
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Re: TRS/ Trans years?
I am with JP on this one. Your engines were upgraded at some point.....
Jon
__________________
God is my Co-Pilot..... but I hit a mountain and had to eat him.
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11-17-2005, 07:47 PM
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#4
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Registered
Join Date: May 2005
Location: Lake Oswego OR
Posts: 984
377 Scarab
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Re: TRS/ Trans years?
this is kind of informal but i've never seen anything above a 330 trs that came originally rigged with a merctrans; all staggered installations and 370 cyclones and above were borg warner
good luck
jeff
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11-18-2005, 01:05 AM
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#5
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Registered
Join Date: Jan 2005
Location: Hurley,MS
Posts: 37
1978, SeaCraft, Seavette
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Re: TRS/ Trans years?
Lots of great info, Thanks guys 
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12-05-2005, 02:03 AM
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#6
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Registered
Join Date: Jun 2001
Location: Babylon N.Y.
Posts: 710
Formula242ls and others
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Re: TRS/ Trans years?
Repowered a 38 Scarab 1982 boat, had the merctrans. Also Bought a 1983 454 trs motor with trans and it was a borg. It's my belief that all '83 and up were Borg's . BBB
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12-05-2005, 10:14 AM
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#7
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Platinum Member
 Platinum Member
Join Date: Jul 2004
Location: chicago
Posts: 2,496
1990 38 Fever SSM IV
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Re: TRS/ Trans years?
M y1982 Excalibur Hawk came with 400hp Cyclones and the b/w 72c trannies
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12-06-2005, 08:46 PM
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#8
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Registered
Join Date: May 2005
Location: Lake Oswego OR
Posts: 984
377 Scarab
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Re: TRS/ Trans years?
my 79 377 came with b/w 72s, but staggered motors
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12-06-2005, 09:41 PM
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#9
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Banned
Platinum Member
Join Date: Sep 2001
Location: Deland, Florida
Posts: 25,194
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Re: TRS/ Trans years?
82 Donzi 22 Classic, 330/ Trs/MercII
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12-06-2005, 09:57 PM
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#10
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A-hole with the loud boat
Offshoreonly Advertiser
Join Date: Apr 2001
Location: Naples, Maine
Posts: 4,924
02 Cigarette Mystique T/S
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Re: TRS/ Trans years?
Once again, I believe JP is correct. The MercTrans was offered on the 280hp small block and 330hp 454.
370HP and up were mated to the Borg Warner 71 and 72 series trannies.
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