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mercruiser info for jeep

Discussion in 'Flat Fender Tech' started by Heimbig2, Dec 31, 2011.

  1. Dec 31, 2011
    Heimbig2

    Heimbig2 Member

    Richland, WA
    Joined:
    Jan 13, 2003
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    195
    I did a search and could not find anything that had the total answer.

    I am looking at swaping an mid 70's Mer cruiser 140 hp four cylinder into a 1952 CJ3A. The only problem is locating an intake and exhaust maniforld or header for this engine. The marine items will not work in an automobile.

    Any assistance would be appreciated.

    Mike
     
  2. Dec 31, 2011
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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    Nov 6, 2002
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    4,275
    Look for manifolds from a mid-'60s Chevy II, that engine is essentially a Chevy 153.
     
  3. Jan 3, 2012
    Mr. Gangrene Jeans

    Mr. Gangrene Jeans I See Voices&Hear Visions

    Kansas City
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    Jul 17, 2009
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    282
    I bought a set of manifolds from a Hyster forklift for mine, not cheap at $150, but the Chevy II's and DJ-5's have dried up around here.
    Sullivan made air compressors that use the same engine, updraft carb and straight up exhaust like a tractor puller if you want different.
     
  4. Jan 3, 2012
    '74Renegade

    '74Renegade Active Member

    Fair Oaks, CA
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    How about a Chevy Celebrity or similiar gm car with the 2.5 I4. Isn't this basically a 153?
     
  5. Jan 3, 2012
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    Sep 23, 2002
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    12,529
    No, different engine. The 153 is a Chevrolet design while the 151 is a Pontiac design iirc.


    Sent from my iPhone using Tapatalk
     
  6. Jan 3, 2012
    '74Renegade

    '74Renegade Active Member

    Fair Oaks, CA
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    Too bad. There's a ton of those 2.5's out there.
     
  7. Jan 3, 2012
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Just FYI, the 153 is 2/3 of the Chevy 230. Both the 153 and 181 are part of the 192 230 250 292 family of Chevy inline engines. Search for "Vortec 3000" (3.0L = 181 cid). The 181 was sold and an industrial and marine engine up until a few years ago. There may still be parts available OTC (ie the Hyster manifold).
     
  8. Jan 3, 2012
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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  9. Jan 4, 2012
    Mr. Gangrene Jeans

    Mr. Gangrene Jeans I See Voices&Hear Visions

    Kansas City
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    Jul 17, 2009
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    There are at least two different cylinder head port designs, an eight and a five I think. Make sure the manifold(s) match your configuration.
    A lot of the Hyster forklifts were also propane powered if that interests you, salvage guy would have sold me the complete fuel setup for another $300.
     
  10. Jan 4, 2012
    otto5

    otto5 New Member

    Beavercreek, OR
    Joined:
    Jun 11, 2011
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    I have one of these engines installed in my 2A. Be aware that the intake/exhaust manifolds from the Chevy II's, Postal jeeps, etc. will not cover the larger ports in the 3.0/181" 140 hp cylinder head. I was able to adapt these manifolds via an adapter plate fabbed from 5/8" X 2" or 2 1/2" bar stock with the gaskets from the 153" and 181" manifolds on either side of the adapter plate. Longer mounting studs will be required.

    Most of the boat engines I looked at had a front sump oil pan and pick up tube, which will hit the front axle of the jeep. Car applications should have a rear sump pan. Also if you can source the OMC version of this engine, they are usually fitted with a flat flywheel that will have threaded holes for a pressure plate. My Mercruiser did not have this style but a standard small block chev flywheel will work.
    Happy hunting.

    Otto
     
  11. Jan 4, 2012
    Heimbig2

    Heimbig2 Member

    Richland, WA
    Joined:
    Jan 13, 2003
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    do you have any photos?

    Mike
     
  12. Jan 5, 2012
    otto5

    otto5 New Member

    Beavercreek, OR
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    Jun 11, 2011
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    I have some taken during that part of the project. I'm new at this but I'll give it a go.
    [​IMG]
    [​IMG]
    [​IMG]
    The adapter looks a little crude in the photo, it was surfaced at a machine shop on both sides after the pictures were taken. The one photo shows the manifolds with the casting numbers highlighted and also the number on the Monojet carb should be visible. This engine fits like it was made for an early low hood jeep. It also has the longest stroke (3.6") of the modern 4 cylinder engines making it ideal for a jeep.

    Hope this helps.

    Otto
     
  13. Jan 5, 2012
    Mike C

    Mike C Member

    Austin, TX
    Joined:
    Feb 19, 2007
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    Nice adapter. I have pondered that as a viable solution as well and seems easiest of all. I think I could do a pretty good job of making an aluminum one myself. My 3.0 Mercruiser did have the flat flywheel with threaded holes for pressure plate. I believe it is an '81.
     
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