140 merc
10-10-2004, 06:39 PM
#11
VIP Member
Re: 140 merc
thanks for the info Mr.P. i didnt want to refer to this wrongly when trying to find parts. i think you are correct about the iron duke being the pontiac one. hows your foot doing by the way?
superboat guy- thanks for the link, i think they may have some stuff for it. i thought about the small block route but decided i just want a cheap toss around fun boat, low buck/low maintanance. besides my scorpion still fills my speed and rough water needs for now
. actually this boat is not a Glasstron but thats the best way to describe it. it may very well be a knock off though, sure looks like one. 
superboat guy- thanks for the link, i think they may have some stuff for it. i thought about the small block route but decided i just want a cheap toss around fun boat, low buck/low maintanance. besides my scorpion still fills my speed and rough water needs for now
. actually this boat is not a Glasstron but thats the best way to describe it. it may very well be a knock off though, sure looks like one.
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Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
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10 OPA Class 1 National Champion ( happy now Ed! )
Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
10-10-2004, 09:06 PM
#12
Platinum Member
Platinum Member
Re: 140 merc
The "Iron Duke" is technically a Pontiac motor. It was, however, used by GM in other non-Pontiac applications as well as Jeeps for several years. The "Iron Duke" was a replacement for the ChevyII motor. It came about in around 1978 or so, and was listed as 151ci.
Your 1976 is likely the 153ci ChevyII motor. While not used in production cars beyond 1970, it remained available in crate and marine configuration for a number of years beyond.
The only 4 cylinder GM auto engine available to bridge the gap between the ChevyII and the Iron Duke was the SOHC 2.3 (Vega) motor. Okay, they had a Cosworth version of it, too, but it is considered a specialty motor, not a production motor...
Your 1976 is likely the 153ci ChevyII motor. While not used in production cars beyond 1970, it remained available in crate and marine configuration for a number of years beyond.
The only 4 cylinder GM auto engine available to bridge the gap between the ChevyII and the Iron Duke was the SOHC 2.3 (Vega) motor. Okay, they had a Cosworth version of it, too, but it is considered a specialty motor, not a production motor...
10-11-2004, 07:43 AM
#13
Registered
Re: 140 merc
Dave, the foot still sucks. I can't put any weight on it yet. Hope it will be a lot better by Key West. We'll still get scooters so I don't have to walk too far. 
10-11-2004, 08:44 AM
#14
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Re: 140 merc
If it is the iron duke, there were many parts available for it. Back in the 80's GM had a excellent direct support program for the engine. You could go down to the dealer and order just about any HP part from the catalog. Surely there is somebody in the aftermarket that still supports it.
I wonder if you are refering to the Merc 470 class of engines. These were aluminum but had a iron head. They were based off the Ford 460 and could be made to run. The problem is that nobody ever tried.
Originally Posted by PatriYacht
Later, Merc made some changes to it and casted it out of aluminum. Those may be harder to hot rod.
