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75 SW Restoration

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Post Options Post Options   Thanks (0) Thanks(0)   Quote LennyBoat Quote  Post ReplyReply Direct Link To This Post Topic: 75 SW Restoration
    Posted: May-27-2024 at 9:47am
Nice job Denden, She's looking great!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tomrupp Quote  Post ReplyReply Direct Link To This Post Posted: May-24-2024 at 8:39am
Great job Den Den. The Southwind looks outstanding. It sounds pretty fast too. I don’t plan to trailer to OH for a race with you.
Tom
94 Ski Nautique Open Bow 351 with Carb
95 Double Decker Aqua Patio with 50hp Honda (3 carbs).
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: May-23-2024 at 1:41pm
Keystone Classics
From the 70s
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 63 Skier Quote  Post ReplyReply Direct Link To This Post Posted: May-23-2024 at 11:55am
That looks great!  You're going to have a lot of fun with it this summer.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fanofccfan Quote  Post ReplyReply Direct Link To This Post Posted: May-23-2024 at 8:11am
Nice work!  
2004 196 LE Ski 1969 Marauder 19 1978 Ski
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: May-23-2024 at 7:40am
Well Den, it looks to me like you did a great job on the boat and engine along with learning how to post pictures on CCF Wink

PS..... those look like Cragar mags from the 60's or maybe new ones from Summit
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: May-23-2024 at 12:57am
Pictures













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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: May-14-2024 at 2:47pm


This is a picture of what the prop and writer actually look like. The one that Ken shows the shaft was not hooked through the transmission at that time.
I am going to start another thread for this prop issue as it seems it might be getting complicated
So check out” Prop help for my Southwind on steroids”
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 67 ski nat Quote  Post ReplyReply Direct Link To This Post Posted: May-14-2024 at 9:18am
Awesome. The decals are perfect
Getting pretty jealous of all you guys finishing and getting in water
Do you like the bigger ski nautique
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: May-14-2024 at 8:46am
Den

If you want the people who night normally give you a recommendation, you should probably start a new thread with a clever title like " I need a prop for my Southwind on steroids"  Wink

Then you should say that it's probably about 300 to 320 HP, reverse rotation and right now has a 13X13 Ellis.

Then you'll probably get asked if you're sure the tach and speed readings are right

Then maybe there'll be a request for a picture of your prop, strut and rudder all installed  on the boat to see what you have for clearances.

I thought I'd save you the trouble with the picture, here's one from earlier in this thread. It shows prop to hull clearance of about 1 to 1.5 inches as a guess. The thumbrule is about 10% of the prop diameter, that would be 1.3 inches. It's only a thumbrule

It also shows lots of distance between the strut and the prop, that's how CC built a lot of their boats back then.

People would say to shorten it, but if you were to do that, the prop and hull clearance would be real small or non existent.


Most people are trying to pick up some RPMs and would get something like an Acme 540, but in your case, wanting to load the engine more to bring down the RPMs, you'd want something like an Acme 430.

It's a 13x13 prop and you're probably thinking the Ellis is a 13X13 so why would I get one of those?

The CNC machined Acme props have a lot more blade area. It'll look huge compared to your Ellis prop and drag your RPM's down by a few hundred or so.

If you wanted to knock down the RPM's some more an Acme 1598 is a 13X14 CNC prop, but that might be lugging the engine too much.

Besides Vortec heads like RPM and 5000  at full throttle is kinda like their happy zone 

I'll vote for an Acme 430 to knock your RPMs down and make it more of a cruisin' boat that feels like you shifted to "high gear"

There are a few other choices too

Maybe you'll get some different opinions


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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: May-14-2024 at 3:52am
Got the boat out again after putting larger jets and a different power valve in the holly.
Boat ran unbelievably well.
No matter what we did, we could not cause it to stumble or hesitate or even think of misbehaving a little in anyway.
Got some videos and took a few pics
Anyway, the bottom line is it’s like riding around in first gear or third anyway You get the idea it’s geared pretty low
If you run up to 5000 and stop there and let it ride just a little while you’re going 45 MPH. There is plenty of throttle left after that
So obviously, I need a different prop.
Can anyone make some suggestions as to which prop and where to get it?













picture upload

Here are a couple of pictures to show how good the hull turned out. Really can’t explain it, but those cracks seem to disappear?
I’m sure they’re probably back.
I would love to post videos, but don’t know how and I’ve not seen any on here so I guess it’s not possible

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: May-06-2024 at 11:45pm
It would easily rev to 5000.
If I did not get out of it, it would’ve passed that and kept going I think.
But again, I don’t know how fast we’re going
If I had to guess I would say at least 45 mph
Next trip out, I will get some exact readings on both RPM and speed.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 63 Skier Quote  Post ReplyReply Direct Link To This Post Posted: May-06-2024 at 11:43am
Friday afternoon fishermen kind of expect it I think, at least you aren't putting up mountains of waves like a wake boat.  I always try to stay away from morning fishermen when we ski early.

Checking speed with gps and assuming your tach is accurate seeing speed vs. rpm will tell the story on the prop.  When you say it easily overspeeds the engine, what rpm were you seeing?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: May-06-2024 at 12:53am
Boat is nearly done. Waiting on Ski pole.
Went for a break-in run couple weeks ago. ran around for about an hour and a half.
Everything is fine, motor pulls real strong. Has a slight stumble in about 1750 on acceleration. Nothing serious a few adjustments should take care of that.
Took two speedometers and both failed us so I could get no reading on speed. Prop does not seem too far off, but will easily overspeed engine.
Next time out, I will take good pictures and videos to post and I’m sure be discussing the prop change.
Felt bad about disturbing the fisherman on a nice Friday afternoon.
She’s pretty loud!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: April-08-2024 at 8:35pm
From the pictures it sure looks like there’s no wires on it.
And I can’t find a picture that shows it being wired.
I will check tomorrow and see as I know it was wired before.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 63 Skier Quote  Post ReplyReply Direct Link To This Post Posted: April-08-2024 at 8:36am
Looking good and glad you had a chance to splash it.  Sounds like you are close to having a running boat in a lake!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: April-08-2024 at 8:21am
Looks like you're getting there.

Whatever works for getting the water flowing through the pump is good.

But..........from the "lets keep DenDen safe department" , your Neutral Safety Switch on the transmission is just kinda there with no wires hooked to it.

That means you must be able to start the engine with the shifter at full throttle in Forward or Reverse as an example.

Since that's not really a good thing to be able to do, if you need some help with that, it'll be pretty easy to explain how to wire it in. Wink 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: April-08-2024 at 12:57am
Latest update
Got nice enough weather to try the boat in the pond
The only thing we found out is that it would not draw water through the system that I have shown above.
While it was in the pond, I eliminated everything but a hose directly from the inlet to the transmission cooler.(starting to get smart and plan ahead.)
That seems to work really well. So back to the drawing board.


As you can see in the pictures to follow a rerouted the line to stay as close to the bottom of the boat as possible.
Today it was back to the pond, it worked perfectly.
As soon as the boat was in the water the line and the strainer filled completely up. On startup it drew water immediately and continue to do so as it idled.
Everything seems to work well as best we could ascertain in the pond. The pictures show the interior only. I will take some pictures and videos when I get it out of the shop and to a lake. (hopefully very soon)



















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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: March-20-2024 at 6:56am
Originally posted by swilliams swilliams wrote:

Den, you may have addressed this but did you use the same distributor that came off of the 307? If so you may need the stronger advance springs for that 350. I know OMC had different springs for the different hp ratings. The advance weights were the same but Mallory had I believe three different models. Steve

Seems to me that Den's distributor will be fine and it's pretty easily adjustable as far as getting your desired initial and total advance.

His engine isn't exactly what GM/OMC built in the 70's either with his new heads and cam

Maybe OMC had some little spring differences, but if you were to look at something like let's say, a DUI replacement distributor for example, they sell you the same distributor with the same decent curve for a 305, 350, 454.......no difference. If you want to change the curve, that's up to you.

Got any charts of those advance curves in you OMC manual? 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: March-19-2024 at 7:24pm
Yes, I have the exact same distributor that was in the 307.
When I get ready to officially time, the motor up, I will see what we have advance wise.
If I remember correctly, it only advanced 27° at 3500 RPM.
I am thinking the total advance should be above 30 maybe 32
The only timing we did so far was to set it at 20° BTC @ 2000 RPMs while we were breaking the cam in

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Post Options Post Options   Thanks (0) Thanks(0)   Quote swilliams Quote  Post ReplyReply Direct Link To This Post Posted: March-19-2024 at 4:00pm
Den, you may have addressed this but did you use the same distributor that came off of the 307? If so you may need the stronger advance springs for that 350. I know OMC had different springs for the different hp ratings. The advance weights were the same but Mallory had I believe three different models. Steve
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: March-19-2024 at 1:45pm
Thanks
We knew about the bending of the studs, the Rochester Quadra jet that was on it had much longer studs in the back.
I think we got it figured out
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: March-19-2024 at 5:11am
Originally posted by DenDen DenDen wrote:

Thanks for the answer Ken.

My son and I decided to just purchase two 5 degree plates, and put them both on for a total of 10.
I don’t see why this would cause any problem, unless someone else can think of a reason not to.


You're gonna have some fun with the mounting studs especially the rear ones.

You have to bend them a little for a wedge and I'd figure a wedge sandwich will take some creative multiangle bending to have everything lined up with the carburetor mounting holes.

I guess you just gotta have a spacer (or two) for whatever reason  Wink

PS..............here's a link to the 8 degree that I mentioned earlier

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: March-18-2024 at 6:28pm
Thanks for the answer Ken.
The last boat I had was a 351 with a Holly but I couldn’t remember how it was set up.
My son and I decided to just purchase two 5 degree plates, and put them both on for a total of 10.
I don’t see why this would cause any problem, unless someone else can think of a reason not to.
To update our progress as I mentioned earlier, we made it through the cam break-in with no problem.
The Almost 5 gallons per minute water supply was just barely enough, when the thermostat opened that would cause the exhaust manifolds to heat up to about 120°. and then they would
cool right back down to touch.
We could tell when the thermostat opened because we have clear hoses and the water would become dirty .
Nexts; tune it up and take it to the pond to see how the circulation pump works
After that, I will put the interior in and get ready for a warm day to go to the lake.
I will take a bunch of pictures between now and then to post.
PS
our weather is turning cold for the next little while

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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: March-18-2024 at 4:03pm
Hold on there Den Den

I'm thinking that you have a Summit intake with the Holley/Edelbrock bolt pattern for the carburetor.

If that's the case just bolt the Holley on and be happy.

All those PCM Fords over the years had no angled spacer for the carburetor. They had a 1 inch spacer with no angle to it and those Holleys worked just fine.

Sometimes a slight lowering of the front float bowl was done by people because of the engine's mounting angle, but that was about it.

Since a Holley carburetor is kinda dumb and doesn't know whether it's a Ford or Chevy under it and the mounting angles are the same I'd go without one with the Holley. Wink

If you just gotta have a spacer, I'll dig up the part number for one that I used before, that was a whole big bunch cheaper and had around a 7 or 8 degree angle or maybe a little bit more. ( it came on an engine with an Edelbrock carburetor if you're wondering why I had an  angled spacer)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: March-18-2024 at 2:37pm
I decided to measure the one that came with the boat on the 307 which was a Rochester Quadra jet.
I get 10°
Does anyone know what angle these carburetors are to be mounted at?
I understood the motors were at 15°.
I’m not even sure that is correct.
Once again, I need some help from this forum
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: March-18-2024 at 1:45pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: March-18-2024 at 1:42pm
https://ibb.co/j389dTn

We got the motor in the boat got the cam broke in.
Bought a new Holly carburetor to find that I need a new wedge plate underneath of it
I’m assuming it’s a 15° angle one like the picture shown above. This one on eBay will cost me almost $200.
Is anybody got something like that laying around that I could get or less money.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote KENO Quote  Post ReplyReply Direct Link To This Post Posted: March-08-2024 at 7:44pm
Alright Den

Are you trying to see how many hose clamps you can use on one side of the exhaust system? Wink

I think I see 10 in the picture of the left side manifold (and no coil wire)

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DenDen Quote  Post ReplyReply Direct Link To This Post Posted: March-08-2024 at 12:20pm
Update:
I cut off the dipstick so the handle doesn’t even stick out much. Will remark the full line when I can.
New picture of my water strainer, thanks for everyone’s help.





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