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  1. #1
    Petty Officer 2nd Class
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    Default Questions about an older Chris craft

    Getting real serious about a 1969 31' CC commander, twin 327q's low hours since rebuilds, my question is why did CC install these motors backwards? and not its not a V drive boat, the front of the crank mates to the trans its hard to see exactly how this works because of the heat exchanger is mounted on top of the tranny.
    1973 30' Tollycraft Express "Bad Idea" powered by twin 1996 Mercruiser 350's

    1973 26' Tollycraft sedan, powered by a 1995 Mercruiser 5.7 inboard

  2. #2
    Moderator Bondo's Avatar
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    Default Re: Questions about an older Chris craft

    Quote Originally Posted by rthomas View Post
    Getting real serious about a 1969 31' CC commander, twin 327q's low hours since rebuilds, my question is why did CC install these motors backwards? and not its not a V drive boat, the front of the crank mates to the trans its hard to see exactly how this works because of the heat exchanger is mounted on top of the tranny.
    Ayuh,... I haven't a clue, as to the answer to yer question,...

    Like I said in Scott Smith's thread,...
    Quote Originally Posted by Bond-o View Post
    Back in those days, ChrisCraft used many, Many custom castings from Chevy...
    These are Nothing like the castings used by Chevy, even though they are Chevy castings...

    Some of the Strangest SBCs I've ever seen, were ChrisCraft motors...
    Any Grease is Better,..... Than No Grease at All.......

  3. #3
    Commander
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    Default Re: Questions about an older Chris craft

    There was so many configurations of engines in the 50's and 60's. Just like CC installed counter rotating engines in all their single engine boats. They felt all single engine props needed to turn clockwise. But the Q series was different. Now remember, the old flathead six engines was always installed flywheel forward.

  4. #4
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    Default Re: Questions about an older Chris craft

    Wild guess here. Maybe it had to do with the front slump oil pans and keeping the starter high and dry?
    rebuilding 3 classics
    17 Irvette I/B CC 99%
    20 Shamrock I/B Pilot house. 50%
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  5. #5
    Commander
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    Default Re: Questions about an older Chris craft

    Many of the old flatheads actually shared the oilpan with the crash box and used the same oil.

  6. #6
    Petty Officer 2nd Class
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    Default Re: Questions about an older Chris craft

    Yeah the starter thing is the only strong logical reason I can see, I guess they missed the bus on being the first ones to piggy-back a starter.
    Yesterday I did the "mechanics inspection" and was not at all pleased with what I found, the port engine (witch is brand new) has a lot of internal clatter and continually backfires out of the carb and has low compression (avg 110psi), we looked in a few of the cylinders with a camera and could see that it has very fresh hone markes, my thought on that is that the rings have not seated yet. the starboard motor seems to run well and makes no noise, we spot checked 3 holes and got 160 on all, the problem with the starboard motor is that it has a pretty bad oil leak that isnt obvious from the top of the motor. I think that both carburetors are junk, they appear to be original and they run very rich (as per plug appearance)
    This boat was advertised as a turn key-ready to go setup and it seems to be anything but, I will guess that taking care of these issues could run about $5k does that sound reasonable?
    1973 30' Tollycraft Express "Bad Idea" powered by twin 1996 Mercruiser 350's

    1973 26' Tollycraft sedan, powered by a 1995 Mercruiser 5.7 inboard

  7. #7
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    Default Re: Questions about an older Chris craft

    5 k is a bunch. I would check for valve timing and a few other things. Maybe a wet compression test will rule out rings and rule in the cam timing.
    rebuilding 3 classics
    17 Irvette I/B CC 99%
    20 Shamrock I/B Pilot house. 50%
    28 Slickcraft I/B FB 60%

  8. #8
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    Default Re: Questions about an older Chris craft

    One of them is a leftie but I think its the starboard motor and its the port one that yaks. I met with the owner and he agreed to fix the oil leak on the starboard motor and take care of whatever ales the port motor, which is hopefully only a valve adjust, Ill take care of the carbs and some other minor stuff with the rest of the boat.
    1973 30' Tollycraft Express "Bad Idea" powered by twin 1996 Mercruiser 350's

    1973 26' Tollycraft sedan, powered by a 1995 Mercruiser 5.7 inboard

  9. #9
    Ensign Ned L's Avatar
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    Default Re: Questions about an older Chris craft

    There is a real reason. Running the engine 'flywheel forward' allows the engine to sit lower in the boat, which equates to a lower shaft angle. AND. Likewise at any given shaft angle it allows the engine to sit farther aft in the boat.
    There is a 'stub shaft' that presses on the timing chain end of the crankshaft that is the input for the reverse gear. The timing chain is inside the rear bell housing between the block and the reverse gear. Those C.C. small block Chevy marine conversions are real nice engines and still very desirable for the mahogany speedboat crowd and others (for exactly the reason I mentioned above).

  10. #10
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    Default Re: Questions about an older Chris craft

    The shaft angle makes sense, my big concern is availability of things like risers, pumps and heat exchangers. A good number of these older CC's have been converted over to a Crusader setup and that makes me wonder if there is something not good about these setups.
    1973 30' Tollycraft Express "Bad Idea" powered by twin 1996 Mercruiser 350's

    1973 26' Tollycraft sedan, powered by a 1995 Mercruiser 5.7 inboard

  11. #11
    Master Chief Petty Officer F14CRAZY's Avatar
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    Default Re: Questions about an older Chris craft

    Check with the chriscraftcommander.com guys.

    The Q series was to allow for lower mounting and to keep the flywheel from picking up bilge water.

    I have Q's with V drives, making a double backwards configuration. Difficult to explain to people...
    197133' Chris Craft Coho/Catalina Sedan, twin CC 327QA's, Paragon V drives. Restoration in progress1985 Bayliner Capri 1952 (19' cuddy),OMC 3.0L. Restored with the knowledge here on iBoats'70 (circa) Amphicat 6x6 AATV, future Coho tender'87 Kawasaki 650SX, '90

    Tow rig: '74 Buick LeSabre Luxus convertible 455ci cude U 4BBL factory dual exhaust

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