Classic SeaCraft Community - 74 Seacraft Tsunami

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Re: 74 Seacraft Tsunami

Added some more glass around the edges of the transom last night. Followed up this morning adding some roven supports prepping for the final layer of roven on Tuesday Night.

Glassed the fiberglass tanks supports in today as well.

http://i28.photobucket.com/albums/c2...TRANSOM049.jpg

http://i28.photobucket.com/albums/c2...TRANSOM050.jpg

I need to do some clean up tomorrow.

My motors await a new transom.

http://i28.photobucket.com/albums/c2...zzen/side1.jpg

Best of luck.

Jason

Re: 74 Seacraft Tsunami

Removed the old water logged ply wood under the area where the battery boxes used to be located. I replaced it with a foam core followed by three to four layer of chop mat. Solid, water proof, and will never rot or hold water. These two platforms will be for my oil resevoirs. If I decide to go with four strokes for my next set of motors, they will become storage.

http://i28.photobucket.com/albums/c2...TRANSOM053.jpg

http://i28.photobucket.com/albums/c2...TRANSOM055.jpg

Some grinding and clean up, and they should do just fine.

Finished up the bilge and decided to set the tank to get it out of the way. I never totally removed from my boat, as it still has 50+ gallons left in it.

This shot is of the tank in place as well as the oil res. platforms.

http://i28.photobucket.com/albums/c2...TRANSOM056.jpg

Transom shot facing the bow. Took off another 30lbs of that putty crap used to stick the original deck.

http://i28.photobucket.com/albums/c2...TRANSOM057.jpg

Next on the agenda, finish final layer of woven roved on the transom, fill in the deck scuppers, grind and fair out the out side of the transom.

Jason

Re: 74 Seacraft Tsunami

Completed final layer of 24oz woven roven on transom. Came out good, but it shure soaked in the resin.

http://i28.photobucket.com/albums/c2...TRANSOM067.jpg

Need to measure, cut and cap the transom at 25 inches.

With twins, the transom can come up a few more inches
, I think. Anyone know what the over all measurement
from the bottom (apex)of the hull? A diagram, or some
kind of photo showing where the measurement should be
taken from would helm. Thanks for any assistance.

Jason

Re: 74 Seacraft Tsunami

Find a vertical centerline on the transom. Measure out each side for the new motor centerlines. Standard was 26" centers so you would go out 13" from the centerline each side. The new 4 strokes want at least a 28" engine center line so you may want to setup the holes for 4 strokes in case you repower in the future. Measure 25" up from the engine centerlines for 25" shaft length motors and this will be your final transom heighth. Make a horizontal line at this heighth and cut your transom. Be sure you have allowed enough width for steering cyllinders and cowling clearance to the outsides.
:D

Re: 74 Seacraft Tsunami

Thanks Hermco,
If I understand you, this is what your talking about, please advise. Did I take the transom height measurement from the right place? or should it be on the lower chine. Thanks again for the assistance.

I borrowed this transom photo from earlier in the post! Thanks guys!

Jason

http://i28.photobucket.com/albums/c2...0_001_0001.jpg

Re: 74 Seacraft Tsunami

Measure up 25" from where the engine centerline begins at the bottom of the boat.

Re: 74 Seacraft Tsunami

Hermco,

What are you using as a notch width for a single 4S (say 150HP) ?

Re: 74 Seacraft Tsunami

I am usually filling the transoms and adding a bracket but if you are thinking of repowering with a 4 stroke on a boat with an existing cut out transom I would temporarily mount the motor with the two top bolts only and hook up the steering then turn hard over both ways. If you have clearance I would turn the motor hard over and begin trimming the motor up carefully to check for full tilt clearance. It might help to have a second person as a spotter so you don't crush the cowling when checking.
:D