1980 H30 compression post plywood

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jphud

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Nov 18, 2010
70
1980 Hunter 37 C Saugerties
Hi there,
The plywood between the steel support and compression post is basically disintegrated. The compression post looks real good, however the plywood needs to be replaced, I have scraped and sealed the steel support. Does anyone know what thickness wood I should use? Do you have a picture of the configuration? Trying to figure out how the floor should meet this assembly. Has anyone jacked up the compression post after loosening stays to slide new wood on top of steel?

Thanks,
John
 

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ggrizzard

ggrizzard

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May 27, 2004
2,056
Hunter 30_74-83 Ponce Inlet FL
Ah JP, the curse of the rotting mast step! All of us who own the classic Cherubinni 30 have faced this problem, but usually the metal Ibeam is rusted out as well, so you're ahead of the game.

My experience is that you must first place a vertical screw jack with a piece of plywood at the top (for spreading out the force) to the starboard side of the existing mast support post inside the cabin then loosen the stays (assuming you aren't planning on removing the mast for work at the top or with wiring).

Next, remove the aft facia panel from the box enclosure of the support pole (The one facing the camera in your pic). At this point you can determine how much lift to apply to the jack. Once the pole is loose enough to move, take it out and then you can remove the rotten plywood spacer between the pole and the metal base that you've cleaned up.

I would suggest using a 1 inch thick piece of starboard or any high strength plastic cut to fit the space (the original plywood came in the approximate shape of the UPS logo (see attached pic). If you must use wood as a replacement, make sure it is sealed with ample coats of epoxy on the top, bottom & edges.
 

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J

jphud

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Nov 18, 2010
70
1980 Hunter 37 C Saugerties
Sounds like a reasonable plan, I'll let you know.
thanks
 
J

jphud

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Nov 18, 2010
70
1980 Hunter 37 C Saugerties
Everything worked out fine, replaced wood with " starboard."

Thanks again
 
J

Jeff Dunham

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Aug 6, 2005
9
Hunter 30 Ft. Monroe, Va
JP...I am facing the same effort this summer that you have been working with replacing the metal block that ists in the bilge. Do you have any pictures of the steps you have taken other than those posted? I am thinging of finding a yard on the southern part of the Bay and a picture of the effort will help in securing a realistic quote.

Thanks,

Jeff
 
J

jphud

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Nov 18, 2010
70
1980 Hunter 37 C Saugerties
Hi Jeff,
The steel I beam on my boat was in good condition. The surface rust was brushed off and then it was painted with an anti-oxidating solution then paint.
Much force was needed to take the weight off of the wood compression post, even with all the stays loose. I was able to use the steel I beam as the base for the colum jack, you will not be able to that. First I bridged the bilge with a steel plate for the jack base but it placed to much pressure on the floor. You might be able to provide a better bilge bridge(more surface area) and that may work. You are also going to need more room than my repair needed. My best guess is you will have to step the mast to get rid of the weight. Then it will be easier to jack weight off of the post and you can repair and replace.
 

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ggrizzard

ggrizzard

.
May 27, 2004
2,056
Hunter 30_74-83 Ponce Inlet FL
JP, That's the definitive pic for the repair job, except for exposing the facia panel revealing the actual compression post. Any chance you have a pic with the post "revealed"?
 
J

jphud

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Nov 18, 2010
70
1980 Hunter 37 C Saugerties
jphud said:
The facial panel is off in the pic. The post is a wood 4x4.
Click to expand
The holes in the pic are where the panel was screwed in.
 
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