I/O (Sterndrive) Conversion to Outboards

[aspeck]

1.408 ... is that a "wee bit" bigger than 1.400?

 

[tphoyt]

Looking great. The weather has finally become somewhat normal so you should be good there.

 

[tpenfield]

Happy Friday . . .

Of course, every day is the same for me, being retired.

I'm getting ready to glass the top. It has been a good cutting and roll-out platform, but now it's time for its glass.
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I need to 'flip' this thing over to do some corner rounding and probably will glass the underside. Then back upright to finish off the transom, add the splash wells, some access holes, and even some rigging tubes.

The extension bracket has gained considerable weight in the past couple of months. It started to crush the black tote-crates. I did a quick estimate of the weight based on the materials I have used and came up with 450 lbs.

I'll have to figure out how best to move it around . . . Probably will be getting some more mover's dollies.

 

[Scott Danforth]

1.408 ... is that a "wee bit" bigger than 1.400?

True, but the caliper is +/-0.050" at best

 

[alldodge]

Not as critical as doing a I/O but when ya get a bit closer, suggest use 2 straight edges (one on each side) and measure that way

 

[tpenfield]

Not as critical as doing a I/O but when ya get a bit closer, suggest use 2 straight edges (one on each side) and measure that way

Yes as I was taking measurements, I was wondering how flat the outside of the transom should be so as not to distort/crack the engine bracket.

The straight edge is probably the way to go.

 

[tpenfield]

True, but the caliper is +/-0.050" at best

I do have some micrometers that I could break out, but the handy electronic one is good enough . . .

I'm just checking my laminate dimensions . . . The Coosa measures right at 1.00" . I have the following laminates on the transom now:

3 x 1708 (0.045" typical thickness) 0.135" = 1.135
2 x 1808 (0.046" typical thickness) 0.092" = 1.227
2 x 2415 . . . Thickness would be 0.0865" per layer to get to 1.40"

So, the 2415 stitchmat is about twice the thickness of the biaxial cloths, which is consistent with the research I did on the 2415.

 

[tpenfield]

This is the biggest single piece of fiberglass (50 x 90") and took a long time . . . probably 2 hours start-2-finish. 100 oz. of resin.
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I initially tried to soak the resin into the cloth top-down . . . that didn't work. So, a quick change on the fly to soak the Coosa board with resin and lay the fiberglass cloth over it. Much better.

I am into the 5 gallon pail(s) of resin and I thinned this batch out a 'wee bit', as the resin looked a little thicker than the other resin I was using (Fiberlay/Fiberglass Warehouse).

In other news, one engine has shipped and the other should be right behind it. Delivery should be next week. (I'll be in VT skiing . . . going to try my luck on the slopes on Friday the 13th )

 

[tphoyt]

It looks great. I hope you’re having a blast doing this. I know I would. Enjoy the slopes and the Best of luck on Friday the 13th. It can be good luck for some. Hope is on your side.

 

[Pmt133]

which laminate is that again... you know, since you're using so many. I know what you mean with the resin though. One of the buckets I got from us composites was totally different than the other 30 gallons and a somewhat different tint even. Worked fine just behaved like gravy vs a motor oil if that makes sense. You thin with styrene?

Enjoy skiing. My cousin has a place in Wilmington that backs up to some slopes... absolutely beautiful up there this time of year.

 

[Scott Danforth]

. (I'll be in VT skiing . . . going to try my luck on the slopes on Friday the 13th )

Just don't do a Sonny Bono

 

[tpenfield]

The top plate laminate (Post #888) is 2415. I may be adding some 1708 in the area that will be 'exposed' behind the swim deck. the rest of the surface will have a plethora of through-bolts.

 

[alldodge]

Things keep getting heavier and heavier, hope your initial calculations are within limits when finished. Either way this is a great build and will be awesome when done

 

[flashback]

Absolutely beautius, It's definitely turning into a monoblock.

 

[tpenfield]

Lifting Update . . .

I bought a shop hoist to lift the extension bracket. Some assembly was required. Then, I put a couple of U bolts in through the top plate to hook onto.
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I figured if I can put it on dollies instead of blocks, I can move the thing around as needed.
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EXCEPT . . . the extension bracket balances on the back of the planing surface where it rests on the dolly. The dolly in the front is loose and nothing else is holding it. The Homer Buckets are on the ready though in case it gets tippy.

In terms of flipping the extension bracket over . . .

Plan A - lift the aft portion as high as I can and see if I can get it attached to the furniture dolly.

Plan B - Watch the snow melt and bring it outside to the gantry and lift it very high in the air until I can make it somersault onto a set of dollies.

(the smart $ is on plan B) . . .

 

[tphoyt]

The snow is melting fast it won’t be long