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[jaymac]

About to fit 3 new motors  but first have to remove the horrendous motor base previousy installed(not by me) the wood  is not so much the problem its the .I would think epoxy. but looks like mortar.Any suggestions other than  cutting hacking grinding as  worried about the hull. any solvent that might soften it but not the hull 5 Pics  from the front and back looking forward on one side T'otherside identical
Thanks Jay

 

[DaveB]

Hi Jaymac
It looks like they used Gripfill to stick the motor mount in with, i'd suggest grinding it out a little bit at a time to avoid heat damage.
Good luck Dave

[inertia]

Jay
I can't think of any solvent that would make a mark on that stuff without eating away the glassfibre. I'd think about resting the hull on a bag of sand to ensure as much support all over the outside as possible, then just chipping away at it with a chisel.
Your remark about mortar reminds me of the bloke who took the instruction to "cement the ballast into the hull" too literally, and then wondered why his model wouldn't float!
Good luck.
Dave M

[john44]

He must have used ready mixed mr M 


John

[Brian60]

Dremel with plenty of sanding disks. Don't work in one area too long, the filler will melt onto the disk if you do.

[inertia]

He must have used ready mixed mr M 
John

Blue Circle's finest, m'duck!
DM

[Fastfaz]

     I agree with Dave sit her on a bag of sand or similar then chip away, If its been stuck in with gripfill (evo stick in a tube) you could, very carefully, soften it with thinners but I would chip away and if the worst happens and you puncture the hull fibreglass a reinforcing patch over the top of the damaged area job done! If it is P40 fibreglass strands you are going to have to chip away slowly to remove it just don't try and rush it. Hope this helps.
      Cheers,
           Faz.

[nemesis]

Often you do not get a good bond when using bodge et all to the hull. A method I have used is to get a sharp chisel, find the edge between the bodge and hull and with the bevel side down give it a sharp whack, worth a try. If not back to the grind. Or, if it is a lot you can always cut the hull section out and relaminate. Depends which is the easiest way to get the result you want. Often the longest way is the quickest. Nemesis

[Plastic - RIP]

4" angle grinder to remove the bulk.
Power File & dust mask to level the surface - a job for outside?

Repair any damage to the inside when finished.

[Danny]

Often had to get mounts, etc out from grp power boats. At first I used to use the chisel method, but after going through a few hulls changed to grinding. Easiest I found was a Black and Decker power-file (or the small Dremel one for 'more delicate' work).  Just keep your eyes open for the colour change as you get through the various layers then stop at the white (in your case) fibreglass.  Out in minutes and leaves a nice rough sanded surface ready for the new mounts.
 

[radiojoe]

The best tool I can think of for that job would be a Multi-tool they have an ocillating action, used with the narrow blade to gradually cut small bits away, of course they aren't cheap but a good tool to have anyway.

[jaymac]

thanks to all for replies  well the heat gun does not have any effect  so spent most of the day chipping away found a  kitchen table  knife slighty flexible and a big screwdriver  persuaded with a hammer  has shifted quite a bit so far. hopefully might get it finished tomorrow.Thanks again All
Jay

[derekwarner]

Just like lengthening a real ship  ...get a hacksaw, and cut the hull in two places to remove the crud, then replate the hull..... Derek

[Delboy1958]

Hi Jaymac
Gripfill is softens with hot water from a kettle but not boiling you should
then be able to use a wood chissell to scrape it out.


Derek

[jaymac]

Thanks Derek that was the first thing I tried then sticky stuff remover no joy with either. Anyway with continuost tapping and chipping now got it all off. Did that whilst still on the stand bit hairy but  safer than sandbagging  due one can't see anything  with both hands in seperate hatches holding chisel and hammer have to listen to sound changes  for any indication of chisel progress then stop and check anyway managed with no damage done .Just got to workout  brackets for the motors now  as standard ones wont be any good blutack any good
Thanks again for all assistance
Jay