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1978 Proline 20 Rebuild

Old 07-30-2018, 12:56 PM
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Originally Posted by Captadam View Post
yes i had a 1977 Mako 25 I was going to restore but found the hull to be compromised in many places so I got rid of it.
I was one of the people who came to look at it. Glad I didn't buy it then since that wasn't mentioned.

Good luck with this rebuild.
Old 07-30-2018, 01:02 PM
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Originally Posted by thejeepguy87 View Post
i was one of the people who came to look at it. Glad i didn't buy it then since that wasn't mentioned.

Good luck with this rebuild.
ouch
Old 07-30-2018, 02:13 PM
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pretty sure i mentioned that i had suspicion that the prior work was shot. The new owner of that hull completed it and is currently running the boat out of sarasota. Anyway more progress pics to come this week
Old 07-30-2018, 08:41 PM
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Yikes!
Old 07-31-2018, 06:27 AM
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I had one of thold hulls with OMC Seadrive days 115 hp 150 hp is plenty on that boat. They do like to bow steer in a following sea.
Old 07-31-2018, 03:19 PM
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Yes the bow flair is pretty dramatic. I plan on adding a transom bracket and going with the new Mercury 150.
Old 07-31-2018, 06:26 PM
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Already mentioned but go ahead and get a good dust mask. The 3m half mask with p100 filters is what I use. Also get a good pair of goggles that fit good.

Sawzall and angle grinder will do a lot for the tear down and a flat bar with a 3 lb hammer.

Nice looking hull for a project. I vote no rails.
Old 08-02-2018, 06:13 PM
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Little baby step progress. Stripping it down and it looks much better without the bow rail. Going to start tearing the transom out this weekend
Old 08-03-2018, 04:29 AM
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A 150 on that hull would be way more power than needed. I have a 2-stroke 150 on a 22' flatback aquasport. It has no problem moving my boat around. Not sure if the added weight out on a bracket would be ideal for your hull. Not poo poo'n just a thought. Looks much better without the rails.
Old 08-03-2018, 05:12 AM
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My brother has an e-tec 115 on his 20 Proline. He can’t use all the power available.
Old 08-03-2018, 01:10 PM
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Subscribed...
Old 08-03-2018, 02:25 PM
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After I sold my 20 Proline with rebuilt MMC Seadrive someone replaced it with Gil bracket and Johnson 225 2 stoke believe it or not. I saw it run and it did sit a little low but seamed to run fine.
Old 08-03-2018, 04:02 PM
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Bigtahuna did he have it on a bracket?
Old 08-04-2018, 04:55 AM
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No bracket, it’s on the transom. It just gets squirrelly at wot. I haven’t ridden in it to see for myself but that’s what he’s told me. He doesn’t have trim tabs, maybe that would help settle it down. He also doesn’t typically run it very fast either so it’s not a big deal.

Last edited by bigtahuna; 08-04-2018 at 05:01 AM.
Old 08-04-2018, 06:50 AM
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IMO a 150 would be a nice power match for that hull.
Old 08-09-2018, 07:41 PM
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So a little progress made. I ordered a new trailer from ACE trailer. Was going to wait but it will make it easier to do work on the hull on the weekends if I can bring it to my house. Starting on the transom this weekend
Old 08-10-2018, 05:35 PM
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I completed an I/O to bracket OB conversion on my Pro-Line 251.
Stainless Marine was the OEM supplier to PL. I ordered my bracket from them; terrific customer support and knowledge.
I went with a full width single bracket design with additional flotation. The full width is more$$$ but makes boarding the boat when it is on the trailer, swimming, hooking up the flush easier.
Down side is the back of the transom needs to be flat. This will probably require more flairing and sanding to finish the transom work.
My transom was 2 inches thick when i started on it. The core was 1.5 inches of Divinycell. I added glass to the inside as a bit of insurance.. I hung a 300 Suzuki. Over 200 hours now without issue.
Enjoy the build
Old 08-12-2018, 12:28 PM
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So I finally go to tear into the boat today. Only got a few hours as the storms built up quick. Started cutting the transom out. The stringers are complete mush. They only used one layer or woven to secure the stringers to the hull which peel right off. Transom wood is soaked. Hopefully get the transom completely stripped this week.

​​​​​​​


Pop up tent saved my tail from the sun


secured the hull with extra stands.


Soaking wet
Old 08-13-2018, 07:29 AM
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If the original stringers were that flimsy, how well built is the rest of the hull?
Old 08-13-2018, 02:26 PM
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Im sure 40 years ago when the stringers were put in they were solid but use and abuse took its toll. I am not worried about the rest of the hull. I am taking it down to the glass and building it back.

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