I have a new one to replace the old leaky hatch. previously someone posted a good description on how that should be done. Would appreciate that again, since I have misplaced it. Thanks
Cliff : I wrote an extensive Mainsheet tech note article on how to replace that center hatch with an identical Bomar.
Later I recommended that owners replace it with a lewmar rather than a Bomar (because of the hatch adjusting arm is NOT attached to the lens !!!)
That lens open/close/adjustment attachment pressure tends to eventually crack the lens!!
A thought
I believe Ron means the hatch opening/support arm is not attached to the lens in the Lewmar. However, I have the Bomar and have not had any issues with it (yet).
for good or bad, I already bought the Bomar
PS what year was that article? thanks again
not in tech wiki and under tech notes, says not there, renamed...so bottom line, could not find it
Cliff, I, too, wrote a Tech Note, on rebedding my Bomar, same issues though. Early 2010s. The TNOs are out of service temporarily, perhaps you can find it, even includes pictures. Use BedItwithButyl.
A quick note on Stu's commemt to use butyl...
I replaced my forward trapezoid hatch which is screwed down, not thru-bolted. As I tightened up the screws, they stripped out of the glass before I got enough compression on the butyl to seal. I had to remove it, fill the screw holes and re-bed it with something else (forgot what I used - likely sika or boat life caulk).
I default to butyl for nearly everything, but wanted to throw this experience out there as a data point. It is my favorite bedding compound when I have great clamping force available. When I am unsure of that, I opt for something more pliable.
Quote from: waughoo on May 07, 2025, 08:19:43 PMI default to butyl for nearly everything, but wanted to throw this experience out there as a data point. It is my favorite bedding compound when I have great clamping force available. When I am unsure of that, I opt for something more pliable.
My experience and another data point is that with tapping screws (not machine screws) I can use butyl when the weather hot and snug it down in stages a titch at a time, letting the butyl compress over time rather than putting as much stress on the screw bite as I would if using a through-fastener.
Guys : FYI, I used 3M 4200 instead of butyl rubber and had great success bedding in new hatches!!
A thought