RickK's 170 rebuild

[RickK]

Sweet, Rick!  Foam...a major milestone!  You are going to have one solid boat there.  The hole in the right stringer in that last picture gives a good shot of the thickness of your stringers

Thanks Craig - I measured (too late) and found that the stringer heights were 3/8" different measured from the top of the hull so I added that much to the starboard stringer to make sure both stringers were the same height - not sure how that happened but it did.  Lots of glass to correct it. (Hope the boat doesn't list to that side    )

[RickK]

Rick, just spent half an hour catching up... looks great!

Thanks Rich.
Hows the FB doing?

[fishinonthebrain]

Does oil-less means it spits oil or not?

Means the pump does not run in a oil bath. You won't have the oil fog problem then.

[gran398]

Rick...everything looks perfect. Even with the new pics...my eye keeps going to the tank coffin.  Wow. Pascoe would be proud.

A constructive consideration...the bow PVC run below the casting deck rattling/making noise. If you feel the clearance is tight, maybe a slice of neoprene above the PVC tube.  An incurable rattle at idle would suck. Mention this because a famous brand of pop-up cleat is known to chatter at idle.

Beautiful work....looking forward to the foam

[kaptainkoz]

Hey Rick,
Sorry if I missed it somewhere, I'm curious as to why you reduced the size of the rigging tubes instead of using either diameter the whole way?

[Callyb]

Looks really good Rick. All that time thinking everything through is really showing at this point. <!-- s:cheers: --><!-- s:cheers: -->

Is your pump oil less?

Thanks man.
As for the pump I think it is but not sure yet.

Specs from the site...

Specifications

Gast Model: 72R645-V160-D303X
Design: Oil-less Double Piston
Power Requirement: 120v AC Operation
Start-Up Amps: 12.5 (but does not require a relay)
Run Amps: 5.3
Exhaust Muffler: Included
Maximum Vacuum: 28" Hg
Maximum Bag Pressure: 1960 lbs/sqr ft
Air Evacuation: 5.5 CFM (at 0 pressure)
Port size: 1/4 NPT
Blower Design: Air-Over-Motor
Power Cord: 6' Attached Cord with Plug
Capacitor: Included
Construction: Permanently Lubricated Ball Bearings
Cylinder: Wetted Aluminum Alloy
Weight: 19 lbs
Sound Rating: 74 dB

I can't wait to see you put that pump to work. Did you decide to go with the correct supplies for vacuum bagging?

[RickK]

Hey Rick,
Sorry if I missed it somewhere, I'm curious as to why you reduced the size of the rigging tubes instead of using either diameter the whole way?

The rigging tubes come in above  the tank and the biggest I could go with and have them clear the tank is 2".  My transom is not enclosed so the tubes could not come up and be exposed so I ran them to the corners where I'll build some cabinets to bring everything up and out of. Then I needed to be able to get the shift cables through the tubes and for that I went to 3" and 45s to be able to do that.

[RickK]

Specs from the site...

Specifications

Gast Model: 72R645-V160-D303X
Design: Oil-less Double Piston
Power Requirement: 120v AC Operation
Start-Up Amps: 12.5 (but does not require a relay)
Run Amps: 5.3
Exhaust Muffler: Included
Maximum Vacuum: 28" Hg
Maximum Bag Pressure: 1960 lbs/sqr ft
Air Evacuation: 5.5 CFM (at 0 pressure)
Port size: 1/4 NPT
Blower Design: Air-Over-Motor
Power Cord: 6' Attached Cord with Plug
Capacitor: Included
Construction: Permanently Lubricated Ball Bearings
Cylinder: Wetted Aluminum Alloy
Weight: 19 lbs
Sound Rating: 74 dB

Thanks for posting that.

I can't wait to see you put that pump to work. Did you decide to go with the correct supplies for vacuum bagging?

I bought some double sided tape from a web vendor - not sure when I'll use it though  <!-- s:? --><!-- s:? --> .  I also bought the heaviest plastic I could find at HD - 6 mil - to get me past the initial bagging.  Even that was very pricey - like $24 for a 10x25.

[RickK]

Rick...everything looks perfect. Even with the new pics...my eye keeps going to the tank coffin.  Wow. Pascoe would be proud.

A constructive consideration...the bow PVC run below the casting deck rattling/making noise. If you feel the clearance is tight, maybe a slice of neoprene above the PVC tube.  An incurable rattle at idle would suck. Mention this because a famous brand of pop-up cleat is known to chatter at idle.

Beautiful work....looking forward to the foam

Yup, there'll be neoprene where it can make any noise.

[RickK]

CircleHook and Josh stopped by yesterday and while they were here we flipped the sole over so I got to look at the ledge I glued in. Got a little ooze out in two places so the fit is little off.  I'll grind that off soon.

[RickK]

The foaming is done.  Lewis called and gave me some tips on taping some tape covered wood blocks down over the holes as I went.  Some worked and some didn't.
I learned after the first pour of 2 qts in the port stringer that I probably cut too many holes.  I poured in the back one and it started  coming out of the 2nd hole.  So I quickly covered that and learned from that.  The 2nd pour on the starboard stringer I taped the 2nd hole shut and poured and it came out great.  


The 3rd pour I had it all planned out, tape the 4th hole and mix the same amount, well this time it came up and out of the 5th hole     So I learned from that one too - stringers were less wide I guess.  
Overall I didn't make too much of a mess.  Didn't use a saw when I was removing the excess and had a little tear out - note to self for the future. This is a pic after cleaning up some of the eruptions.

[RickK]

Cut some 4"x4" cloth and pre-wet/rolled them with epoxy and laid them over the holes and rolled it out.  Another check mark on the list.


Maybe do some epoxy painting tomorrow.

[CLM65]

Congrats on the foam completion, Rick !  Looks great!  So let me get this straight...You mixed 2 quarts at a time (one quart of each part), and that was enough to fill at least a few feet of stringer?  I'm hoping to foam mine this weekend, so I really appreciate the info!

[Aswaff400]

Congrats on the foam completion, Rick !  Looks great!  So let me get this straight...You mixed 2 quarts at a time (one quart of each part), and that was enough to fill at least a few feet of stringer?  I'm hoping to foam mine this weekend, so I really appreciate the info!

I want to say I mixed  a gallon when I poured, and I think 8 gallons total, 4 of part a, 4 of part b, 4 lb foam.

[RickK]

For the size stringers mine are I got 4ft per mix.  As I got to the tank area I was getting 5-6ft.  The bulkheads I tried mixing 1pt of each and it was just shy of enough - then I added more and it was too much .
If you are going to use the taped board approach use packing tape for the stringer side and then duct tape to hold it down - I tried packing tape to hold it down and it wasn't strong enough, had to stand on the boards (remember I said how the 3rd pour came out the 5th hole - wasn't ready for that).  Make sure you work out how to tape them down in advance.  When you get to the last hole be careful, hold the board down to allow it to expand past where you're at and then allow it to escape, stuff is pretty powerful.
I used clear 2 plastic containers each marked A or B (and a Qt line) to measure and then I mixed the stuff together in paper 1 gal buckets - toss the bucket and the stir stick after each mix.  Like Koz said - about 15 -20 seconds of mixing is all the time you get.  You can tell when you've mixed it enough because it'll turn to a creamy coffee color - then crush the bucket into a spout and pour - quickly and cover.  Wait any longer and it'll foam right in the bucket.  You learn all this on the fix mix    It takes just a few minutes to expand all the way and you can move to the next pour.
Good luck.