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Graymarine 120 conversion

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JacobErdey
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Graymarine 120 conversion

Post by JacobErdey » Wed Aug 07, 2019 1:02 pm

So, turns out the 1950 18 Chris-Craft Utility project I bought came with a 1956 Graymarine 120 sitting in the engine hole but no attempt had ever been made to hook it up. Currently working on getting the engine to run, which has proven to be pretty difficult because I cant seem to find any info at all on the Graymarine 120 model. So if anyone has had any experience with this model and might have a picture of each side and the top to help me with an oil routing diagram, that would be awesome. And does anyone have any experience with swapping in a Graymarine in the place of the original Chris Craft engine? Trying to figure out different pressure line/rmp gauge/propeller size etc. Any info is greatly appreciated
Current Project: 1950 Chris Craft Sportsman 18'

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Bilge Rat
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Re: Graymarine 120 conversion

Post by Bilge Rat » Wed Aug 07, 2019 3:53 pm

Any idea what model engine it originally came with? Hull card would state that.
1966 Lyman Cruisette 25 foot "Serenity Now!"
1953 Chris Craft Sportsman 22 foot "Summerwind"

JacobErdey
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Re: Graymarine 120 conversion

Post by JacobErdey » Wed Aug 07, 2019 4:27 pm

No I'm not sure. I haven't contacted the Mariners Museum since they opened back up to get the hull card. It is hull number V-18-815 though according to the paperwork I got. Which the V seemed odd to me, but I guess I need to get in touch with the museum
Current Project: 1950 Chris Craft Sportsman 18'

davidvn
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Re: Graymarine 120 conversion

Post by davidvn » Wed Aug 07, 2019 5:06 pm

Hi there were three different model 120s if you post the serial number or give us a call I’d be happy to help you out.

JacobErdey
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Re: Graymarine 120 conversion

Post by JacobErdey » Thu Aug 08, 2019 8:36 am

Plate on top of the transmission says it is Engine #H10573
Different stamped markings on the engine block : A600. 11-12-56. 75001. 75039
Stamped tag on the carburetor shows 12055B
Current Project: 1950 Chris Craft Sportsman 18'

jim g
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Re: Graymarine 120 conversion

Post by jim g » Sun Aug 11, 2019 3:55 pm

JacobErdey wrote:
Wed Aug 07, 2019 4:27 pm
No I'm not sure. I haven't contacted the Mariners Museum since they opened back up to get the hull card. It is hull number V-18-815 though according to the paperwork I got. Which the V seemed odd to me, but I guess I need to get in touch with the museum
V means its a Caviler. They were Chris Crafts plywood division.

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drrot
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Re: Graymarine 120 conversion

Post by drrot » Sun Aug 11, 2019 6:52 pm

JacobErdey wrote:
Thu Aug 08, 2019 8:36 am
Plate on top of the transmission says it is Engine #H10573
Different stamped markings on the engine block : A600. 11-12-56. 75001. 75039
Stamped tag on the carburetor shows 12055B
H10573 makes it a 1957
12055 carb is from a Chris-Craft KFL
Jim Staib
www.finewoodboats.com


1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174

JacobErdey
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Re: Graymarine 120 conversion

Post by JacobErdey » Mon Aug 12, 2019 10:13 am

jim g wrote:
Sun Aug 11, 2019 3:55 pm
JacobErdey wrote:
Wed Aug 07, 2019 4:27 pm
No I'm not sure. I haven't contacted the Mariners Museum since they opened back up to get the hull card. It is hull number V-18-815 though according to the paperwork I got. Which the V seemed odd to me, but I guess I need to get in touch with the museum
V means its a Caviler. They were Chris Crafts plywood division.
Yes, I'm assuming the V was either mis-stamped or mis-documented. The paperwork I got with the boat is questionable at best. She was obviously left to rot away for I'd guess about 30yrs out in the elements, and I've been bringing her back from the grave. the 18-815 has been confirmed by the markings I was able to find but never actually saw a full V-18-815 stamp. Currently 2 years into the rebuild. All construction signs point to it being an 18' 1948-53 Utility. There isn't any plywood on the boat.
Current Project: 1950 Chris Craft Sportsman 18'

JacobErdey
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Re: Graymarine 120 conversion

Post by JacobErdey » Mon Aug 12, 2019 10:25 am

Image

Image

Image

Honestly I should've known better than to even start to bring this one back, but I couldn't let another one be turned to fire wood.
Current Project: 1950 Chris Craft Sportsman 18'

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