Jim Conlin wrote:
Whatever you can make work. Sawzall, jigsaw (carbid grit blades preferred),
Dremel, or 4" grinder might do the job. My favorites are twist drills, hole
saws and the Fein Multi-Master.

"Chris" wrote in message
oups.com...

Hi,

I noticed that during idling, my engine vibrates enough
to constantly hit the water pump on the fiberglass engine
foundation. The last two or three big jumps the diesel does
when stopped bang the water pump into the fiberglass really
hard.

So about about half an inch of the engine foundation has to go.
What is the best tool to cut really solid fiberglass, and how
do I do this? Any advice is appreciated.

Thanks a lot,

Chris


I just enlarged 6 thru-hull 3/16" deep holes with my Dremel tool and a
stone gringer. It was hard to make the bigger holes perfectly round,
but all was hidden by the thru-hull flange.
My niece's husband used to work ar Rosborough boats and when he was at
my house last week, said they would use Milwaukie hole saws for same job.