Fuel Viewport
Fuel Viewport Back to Projects
The 10M (like a lot of other Pearson's of that era) has a view port in the cockpit sole that lets you see the gauge on top of the fuel tank below. One rainy day while I was working from the quarter berth access panel I made, I noticed it was dripping. That was not a surprise. Like all the other hardware mountings on the boat. Pearson sealed this with silicone and the seal had started to leak. After the rain stopped I removed the view port and dug out the balsa around the port. Thee was some wet core but, fortunately, not too much. I took out about 3/4 to 1-1/2" of core around the opening depending on where the wet part ended. I used a screw driver and my Dremel tool. Before doing this I taped a trash bag to the underside of the cockpit sole to catch all the debris.

I taped over the lower holes from the mounting screws and filled the void where the balsa was removed with West System epoxy thickened with 406 filler. I preceded this by covering the surface with straight un-thickened epoxy to get a better bond between the thickened epoxy and the surface of the void. I made the epoxy thick enough so it didn't ooze out. Once this set I drilled holes for new mounting screws. I did not drill through. I drilled and tapped the epoxy for 1" long 10-24 machine screws. That way there are no holes going all the way through the deck for fasteners and no way for them to leak.

I cleaned up the inner edge of the hole with a drum sander on my cordless drill and mounted the viewport with Boat Life Sealer Caulk (polysulfide like 3M 101). I wanted to replace the plastic in the view port but the threads to the collar that hold it in were in poor shape and getting it apart would probably have damaged it. That part didn't leak so I left it alone. If I can find a replacement viewpoint that matches the holes I can replace it. For now it is water tight.

Materials Used
Six 1" 10-24 flathead screws
West System Epoxy (105 resin 205 harneder)
West System 406 Coloida Silica filler
Boat Life Sealer Caulk (polysulfide)