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21 Scarab SOB Overhaul - Pic Heavy http://www.hpbc.ca/viewtopic.php?f=20&t=2656 |
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Author: | dubber [ January 26th, 2015, 6:05 pm ] |
Post subject: | Re: 21 Scarab SOB Overhaul - Pic Heavy |
Awesome! Did you throw some lights and greenery on the hull and trailer for Christmas? |
Author: | OMCFORME [ January 27th, 2015, 10:13 pm ] | ||
Post subject: | Re: 21 Scarab SOB Overhaul - Pic Heavy | ||
Thanks guys, I thought everybody would get a kick out of the garage storage idea. It turns out my neighbours did as well. Lots of people have driven by and taken pictures, and I'm told that my garage is on a number of other websites although I have not seen where yet. Just a bit more background and then I'll get into the current project. The wiring and gauges, new steering, new fuel lines, and a few other minor issues were all done late summer 2012. I had been meaning to post these a long time ago but you know how things go. The V8 project was not progressing very quickly so instead I quickly put a V6 together with stuff I had sitting around. Early 90s closed-deck 3.0L 225 carb, box stock aside from disabled oil injection and a Bob's cone. I'd had the rebuilt long block just sitting around, so at least this got me on the water after all summer sweating under the dash. Attachment: 145 - V6.jpg [ 193.07 KiB | Viewed 2323 times ] The boat came with a homemade static setback bracket that was pretty beefy so I just bolted to that with a couple of setback spacers, for a total of 9" I believe. Launching for the first time - early September 2012. This is at the public launch in Sarnia, actually just a few hundred yards from where they put the turn buoy for the OPA races Jay participated in. Attachment: In the water 2.jpg [ 219.59 KiB | Viewed 2323 times ] It floated, ha ha. With a 23" Renegade it ran right around 60 mph. Acceleration was poor. Almost zero chine walk even with the stock rubber mounts, but I think the trim tabs were helping that. The tabs pump and wiring were shot so they were just along for the ride although fully "up". Torque steer was pretty bad too (no torque tab). Without the hydraulic it would have been a bitch to steer. I had tonnes of water pressure but was on the top hole on the plate. Anyway, lots of room for improvement in the setup but at least I was on the water. I used it a few times in the summer of 2013 more or less as-is (replaced the stereo - no pics), but then I got totally bogged down in some massive house renos and the boat just sat all through the summer of 2014. In the next post I'll get into the current project of getting it ready for the V8.
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Author: | OMCFORME [ February 7th, 2015, 5:19 pm ] |
Post subject: | Re: 21 Scarab SOB Overhaul - Stringer Replacement |
Sorry for the delay in posts, been really busy with real work. Now that I've given all the background, here this winter's project. I discovered some wet spots in one of the stringers when installing a new fuel filter. I had done some quick "tap" tests of the transom and stringers when I bought the boat, and they seemed fine. The bulkhead at the back of the fuel tank was evidently soft, but I was OK with replacing that eventually. I suspected that the transom had been replaced at some point because the homemade setback had a non-BIA bolt pattern. No way it would have left Wellcraft drilled like that. Anyway, I obviously missed some spots on the stringers. Wet stringers are not exactly uncommon on a nearly 30 year old boat. Here's a pic of the transom and rear floor. I'm taking the pic through a large hatch that the ski locker drops into (keep in mind these boats were more intended as stern drives so there's a lot of room back here in the O/B version). Attachment: Scarab Renos 1 214-Optimized.JPG [ 89.41 KiB | Viewed 2284 times ] I unbolting the old static setback (well sealed), and poked around all the mounting holes - wood was dry. To confirm, I cut several "plugs" of glass out of the transom with a hole-saw to be able to probe around some more. You can see the ones I did around the inside of the mounting holes. Attachment: Scarab Renos 1 238-Optimized.JPG [ 68.03 KiB | Viewed 2284 times ] The wood is bone dry. You can kind of see a dark layer in one of the holes - that's the reddish purple phenol-formaldehyde glue of marine plywood (I chistled some of the top veneers off to check it). At this point I was 95% sure somebody had replaced the transom. Replacing the aft potions of the stringer would be easy due to the access, but under the cockpit is a different story. This boat has a full cockpit liner that's moulded as part of the deck (i.e. no plywood floor to lift up). Here's the big cockpit gas tank access hatch removed so I can poke around the forward sections of the stringers. Attachment: Scarab Renos 1 210-Optimized.JPG [ 121.79 KiB | Viewed 2284 times ] I couldn't get to much of the stringers due to the height of the tank, bonding putty, and tonnes of foam. |
Author: | OMCFORME [ February 7th, 2015, 5:42 pm ] |
Post subject: | Re: 21 Scarab SOB Overhaul - Pic Heavy |
After poking around the rear stringers some more, I decided to hell with it, I'm doing the full pull and replacing all the stringers and bulkheads. Nothing was totally mushy, but I found more wet spots. I'm going to be hanging a V8 off a 12"+ setback with tie-bars to the stringers, they have to be mint. The cockpit will have to be cut out and reglassed, and the tank needs to come out too. To prepare for the demo work, I started to protect all the floor gel-coat and interior with cardboard, foam sheet, and plastic. Attachment: Scarab Renos 1 231-Optimized.JPG [ 73.08 KiB | Viewed 2282 times ] Removing interior: Attachment: Scarab Renos 1 255-Optimized.JPG [ 109.26 KiB | Viewed 2282 times ] Started to cut the rear floor out (it's a regular plywood floor - only the cockpit is part of the deck mould). I was surprised that the floor was barely bonded to the rear stringers and bulkheads - some rusty nails and a few strips of glass...nice ..... Attachment: Scarab Renos 1 241-Optimized.JPG [ 77.37 KiB | Viewed 2282 times ] |
Author: | OMCFORME [ February 16th, 2015, 10:14 pm ] |
Post subject: | Re: 21 Scarab SOB Overhaul - Stringer Repairs |
So I've been busy cutting the floor out. I have a Fein oscillating tool and it has been extremely handy in tight spots. I'm using a Dremel universal carbide tipped blade and it does a really good job on both the glass and plywood. Attachment: Scarab Renos 1 244-Optimized.JPG [ 65.36 KiB | Viewed 2257 times ] For a lot of the cutting I've been using a Rigid one-handed recip saw with another carbide blade. Has also been working pretty good in the glass and plywood. Attachment: Scarab Renos 1 259-Optimized.JPG [ 51.68 KiB | Viewed 2257 times ] Here's the port side with the floor all cut out. You can see how somebody has cut the last foot off the outer stringer and (badly) tabbed in a new one. The same thing was done to the inner stringer (the boat has 4, plus 3 large transom knees which look to also be retrofits). This was confirmation that the transom had been replaced previously. I'm only cutting out the portside stringers and bulkheads to prevent unnecessary bending of the boat - I'll replace one side at a time. Attachment: Scarab Renos 1 266-Optimized.JPG [ 52.81 KiB | Viewed 2257 times ] |
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