Surveyor tasks while boat in the sling

Corrosion, Paint, Through Hulls, etc.
fighterpilot
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Surveyor tasks while boat in the sling

Postby fighterpilot » Fri May 19, 2017 7:07 am

Boat will be in the sling, with clean bottom Tue. Morning to start the day of surveys and sea trial. Question—what should I expect to observe from my boat surveyor while in the sling.. I know on fiberglass, extensive bottom tapping, but with aluminum boat ???. Surveyor doesn’t do ultra sound, but will tapping be of any use?? Ought to be checking for anodes, prop condition, shaft condition, rudder condition, and what else???
The engine surveyor will be there as well and he will do some ultra-sound, but I would like to know what to expect from my boat surveyor while the boat is on the hill. Thanks

jralbert
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Re: Surveyor tasks while boat in the sling

Postby jralbert » Fri May 19, 2017 11:28 am

don't know about ultra sound but lots of tapping might reveal a weak spot (like probing wood with a screw driver to detect termites). Visual inspection will reveal pitting and corrosion. If there is serious, extensive pitting, survey over. No need to even bother with engines. You might find shaft corrosion which, depending on the extent, is fixable. Of course, you have to learn what's causing it which is almost always an isolation issue --the shaft must be isolated from the hull at the bearing next to the prop, where it enteres the hull and at the connection to the transmission (using isolating bolt sleeves).

Hope none of the bad stuff is true and the boat works out for you. The double cabin boats were quite nice and comfy
-joel-
former owner 1988 '32 FB Sedan
Chesapeake Bay
twin 318 / 240 hp
Potomac MD

fighterpilot
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Re: Surveyor tasks while boat in the sling

Postby fighterpilot » Fri May 19, 2017 3:54 pm

Appreciate the information. What do I search for to see what and "isolating bolt sleeve" looks like.
Even though this isn't the double cabin it is very roomy from what I can see in the pictures. The fly bridge is huge and got my attention. It will be great to watch the Blue Angles during their summer show here in Pensacola, and for watching fireworks. Also there is a weekly band concert called Bands on the Blackwater here in Milton, Fl, which is along the river and some times there are as many as 30 to 40 boats joining the land crowd to watch the concert.
Very informal, bring the lawn chairs to set in on the grassy lot in front of the stage. or party on the boat and watch.

jralbert
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Posts: 415
Joined: Fri Jul 11, 2014 9:15 pm

Re: Surveyor tasks while boat in the sling

Postby jralbert » Fri May 19, 2017 8:05 pm

I just googled "isolating bolt sleeve" and while I didn't aee a Marinette image, there are lots of examples and I included alink to one that is close to what I remember my boat was equipped with

http://www.centralplastics.com/en_US/gf ... eprod.html

Of course, the idea is to keep both halves of the transmission flanges from contacting one another so stray currents never reach the shaft/prop. That's why, when the shaft is properly isolated, a zinc on the shaft really isn't necessary. But I hasten to add, I always kept one on for good luck and as a wear/corrosion signal. It never had a sign of wear.
-joel-
former owner 1988 '32 FB Sedan
Chesapeake Bay
twin 318 / 240 hp
Potomac MD

fighterpilot
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Posts: 35
Joined: Fri Apr 28, 2017 8:03 pm

Re: Surveyor tasks while boat in the sling

Postby fighterpilot » Sat May 20, 2017 3:28 pm

Thanks for link. Will check it out.


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