1989 230 WA Twin Sea Drives

[Cayuga230]

Hello all, I am a long time Mako owner and now proudly (so far) have a Proline 230 WA With Twin 115 Sea Drives and a blown transom.  The glass work will be the easiest part as single handing the engines off will be a pain.  I am looking for anything via e-mail on the Boat.  The great guys at the factory got me a page from the 1989 brochure for general specs but if a member has any more detailed information I would surely appreciate that for my winter project.  I love the look of the boat and am very excited.

[231CALIFORNIA]

BACK IN Late 1980s wasnt twin sea drives the Hot setup?
Our local towboat used to have them but later i talked to the owner and he said they swilled fuel except on calm water  med plane speed.
h got 2mpg going out to a job, 1 mpg comming back .
the other towboat 4stroke inboard got 1.9mpg out and 2.5mpg back with a tow.
I saw your type hull with a hardtop brand  new  on water and it was a class act.
I never saw it again but it was a beauty, hardtop,radar, the works.
I suggest you  supper reinforce the transom so it ties in with stringers, hull and sides  with tabbing and knee braces so it never has a problem again.
but ive never undertaken that job so maybe bob will chime in with a few hints.
what "blew " the transom, water intrusion to wood? collision? under rated for power setup and weight?
newer prolines have foam tranasom, not sure about 1989.
if you ever re power you will want enough strengeth for possibly heavier motor or motors, 2 stroke or 4.
put a picture of her up both before and after refit/repair.

[Cayuga230]

Thanks for the comments.  Transom issue appears to be a combination of factors. High o the list is water intrusion but adding to it is a Marina who had taken it on trade left the engines up for two years out of the water.  This added strain for sure and actually pulled down and bowed out the top of the transom which popped the rub rail between the motors and allowed further water entry.  I wont know all the fun till I get the motors off and start cutting.  Other that that the boat is whistle clean.  even all the tempo hatches an inspection plates are solid and not chalky.  The boat was nicely bought as whoever set it up spent some cash.  Hydraulic steering was a plus as were the flowscans for both motors. The washdown feature is handy as is the live well.  They did add a Tempo built in Tackle box to the transom as well.  Interior is clean and leak free.  For its age the boat does not have nearly enugh sun damage so I believe it lived indoors over the winters of most of its life.  Floor is great with no soft spots and the trailer only needed tires.  It is a all fresh water boat from Lake Ontario and that is a great benefit for the engines.  They flushed all the time.  So we haul it to the farm tomorrow and start the full assessment and begin the process to get a new transom done this winter.  I will be looking for a hard top over time but transom first.
I am excited, restoring the Number 398Mako hull was a great winter 4 years ago and this is a bit bigger project in one area but much less in all others.  If yu ever come across any reference materials  I would love to have them and I am willing to scan and return any for this board as well. I have been very active on Classic Mako over the years and look forward to contributing here

[Cayuga230]

Hello all

The engines are off and the "gear" my heavens there is a bunch of "stuff" bolted or screwed onto the inner section of the transom.  So I have found a good deal of delamination at differing spots throughout the transom.  I have the pull out and droop down where the top of the transom has pulled out from under the deck and had the rub rail screws pull out and actually tear through the top cap.  I am about to cut out the outer glass skin as I am looking into the seacast concept for repair.  I have some photos started and will post as I get the time.  This is a serious summer project but I like the boat too much and Yes as the Sea Drives have lived their lives in Fresh Water I am planning to keep them.  They started right up so new impellers and some paint and they should be good to go.

[Cayuga230]

Well

The transom is cut open and the mush (wood) is exposed.  Some poor workmanship at the time.  Amazing the the thru transom openings fro the Sea Drives are just painted and the the lower ones are at deck height.  Also odd is that the outermost sheet of plywood is about 3/4inch too short and never filled with glass so there was a perfect shelf to hold water on the end grain.  The glass came off i on clean piece and I am leaning hard towards using Sea Cast.  Tearing out rotted wood for a few days

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