kalebsheridan
Petty Officer 1st Class
- Joined
- Aug 14, 2023
- Messages
- 203
Okay okay I'll buy the gaskets.........I suspect that you know what you really should be doing.
Okay okay I'll buy the gaskets.........I suspect that you know what you really should be doing.
Yes I ordered some left hand drill bits with paired extractors. I'll have to look into a thread protector though. I'm thinking pilling the power head to get better positioning on the screws on question too.See if you can find left hand drill bits, they run in reverse and when they bite in, they often unscrew the bolt ! To get started, get a " center drill" of the same dia as the thread dia. The center drill is designed to help stay centered in the hole and make a drill point starting hole in the broken screw on its center. Then use the left hand drill after soaking with penetrating oil.
Good luck....
Man a drill press would be sweet for this. Yeah doesn't look too tricky to pull the powerhead. Looks like the bolts run in from the bottom? Two of the snapped bolts are just too obscured by the lower cowling to leave the powerhead on.If you have a drill press(or want one), they are real good at drilling out bolts. Pulling the powerhead should be pretty easy, I would think.
What does chase the threads mean? Aviation sealant? What will that do? Will it stop the bolts from salt welding again?You might chase the threads of the bolts that came out, as well as the threads in the casting. Use some Permatex aviation sealant on the bolts upon reassembly.
Oh okay makes sense, great info. Especially on the busted bolts. The two head bolts I snapped I was thinking of running to a large hardware store near me to find replacements rather than finding OEM ones. I'll look from proper steel, as well as look for some taps or dies and aviation permanent. I'll put that on all the bolts since I I tend on using this in the salt."Chase" the threads means cleaning them with a tap or die. Gently run the tap or die over the threads, using light pressure or no pressure. It should restore them to almost new by getting rid of corrosion or old sealer.
The Permatex Aviation sealer is a brush able non hardening sealer. It should make the bolts easy to get out, if you need to remove them in the future.
Look at the bolt heads for their markings. They are likely grade 5 steel. Replace the broken bolts with the same kind of bolts. You may be tempted to use stainless, however, normal stainless bolts are about grade 2, which is not a good replacement for grade 5 steel. Also, SS tends to bond (corrode) in aluminum castings, which is bad.