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  1. Ptr.Torch

    1969 IMP "Thunder" 20 ft, Restoration

    I. Traded a snowblower for a boat. Yeah, this thing is 56 years old. Classic 69 modeling. Classic teal green (yuck!). I'm going from a 10 ft aluminum boat and a 6HP outboard to this. I'm taking a huge step, and it's going to be a huge learning curve. So no room for pride and...
  2. Ptr.Torch

    1969 IMP "Thunder" 20 ft, Restoration

  3. Ptr.Torch

    New member introduction.

    It's guys like you that keep my hopes alive. (Grin) I'm a 60 some Y.O. jack of all trades with a lot of mechanical background, however boating is a new cup-of-tea. I put a 10' aluminum boat on the water last year, and discovered that it is a bit too small. So I jumped on a deal and found...
  4. Ptr.Torch

    Please be safe and don't forget to use your venting blower when fueling.

    The thing to remember is that it isn't the liquid gasoline that burns so spectacularly, it's the fumes. Gas vapor mixed with air only needs a spark. When filling up your tank, you are pushing out those vapors to make room for the liquid. Be sure they are not filling up a void space on your...
  5. Ptr.Torch

    1966 MFG Rebuild

    ?? Where do you get the 60 lb per cubic foot figure? That seems a bit too high to me. Flotation is (I'm probably preaching to the choir) based on the weight of water being displaced. ... did my research ... OIC! Web says 1 cubic ft of water is 62.4 lbs. Foam that weighs 2 lbs.. leaves 60 lbs...
  6. Ptr.Torch

    1966 MFG Rebuild

    Not necessarily. I'm figuring to foam the entire bottom (first thoughts, may change as I figure it all out) then sheet with ply and seal with (?) something. But if the ply is full width, then boards or bracing of some kind that sits on top of the flooring, and inside the gunwales, to "push...
  7. Ptr.Torch

    1966 MFG Rebuild

    ?? If the foam is for flotation, and this is just me engineer brain at work, then it must be securely held inside the boat, such that, you could lift the boat by the deck. If not, then in an inundation event, the deck floats up and out, the boat still sinks. The foam can't lift the boat up if...
  8. Ptr.Torch

    Confused New Owner of an Old Boat

    The damage is on the right side, nose of the Lower Unit. I put it in gear (Forward) and it engages. The dog clutch works when turned by hand. Of coarse that means nothing if the specs and clearances are off, it might whine or chatter to beat the band. But I'm thinking there is a chance this...
  9. Ptr.Torch

    Confused New Owner of an Old Boat

    The drive has two serial numbers. One on the upper/inside, one on the lower/outside. Inside I see #2825276 Outside I have #2824078 Online parts stores don't go back that far and can't (haven't) found them. Here I gets confusing to me. What is this? Or more to the point, what should it be? I...
  10. Ptr.Torch

    Confused New Owner of an Old Boat

    I'm told it is 165 HP. I think Im looking at a GMC in-line 6 (250 c.i.?)
  11. Ptr.Torch

    Confused New Owner of an Old Boat

    1969 IMP "Thunder" 165HP 20 Ft. This is the boat. I know I bit off a huge big bite, going from the 10' aluminum to this is... crazy?! So I started with purchasing the Mercruzer Repair manual.. Now I'm taking stock of what I really have to work with. The manual is of little use here. It is...
  12. Ptr.Torch

    1966 MFG Rebuild

    I'd suggest experimenting with a chamfer bit, and pulling as little material off as you can. If the idea is to remove sharp edges, the roundover fits the bill, but it may leave you with too little surface area between wood and fiberglass. A light touch with a chamfor bit would leave more...
  13. Ptr.Torch

    Confused New Owner of an Old Boat

    ::: I have a lot to learn ::: ?? Do you think there is any chance of repairing or replacing the lower section ?
  14. Ptr.Torch

    1966 MFG Rebuild

    When you mention foam fill, are you thinking of a spay on like I see in hardware stores or perhaps the sheets of foam. I'm following this thread because I'm probably going to be doing something like this at a 1969 IMP Thunder I picked up.
  15. Ptr.Torch

    Confused New Owner of an Old Boat

    I recently made a non-cash deal for an older boat. What I think I have is an IMP "Thunder" from 1969. Sporting an in-line, 165 HP 6 cyl (GMC?) engine and a Mercruiser Stern Drive. My book tells me I should be looking at a 250 GMC engine Moldel #160 The Stern Drive tells me its for a 120-140...
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