Looked fun for a little while

[XstreamVking]

For that application I would have used grade 8 bolts in metric size to make it the tightest fit I could. The holes in the bracket are 9/16'' and using grade 5 SS 1/2'' bolts is not good enough. And brass nuts are way too soft.

[99fxst99]

At about 30 minutes when he says and we’ll work on it tomorrow that says game over to me. The internals in that engine will cook overnight.

[Forkin' Crazy]

For that application I would have used grade 8 bolts in metric size to make it the tightest fit I could. The holes in the bracket are 9/16'' and using grade 5 SS 1/2'' bolts is not good enough. And brass nuts are way too soft.

You ever seen grade 8 in a salt environment? They are bad enough when they are not, plated or not.

They make different grades of SS. I think they should be using at least 5/8 fine thread, or two 1/2 top bolts each side as said, six bolts per motor. Mine has 8 on each motor.

[SUNKIST]

[I]not that hard to bolt an engine up...double everything

[Forkin' Crazy]

Torque wrench, locking stainless nuts, red locktite for good measure. If seriously in doubt, aircraft safety wire. I use torque wrench on everything these days it has upped my end game of builds ten fold. Hardly ever have mystery fails anymore. Who'd a thunk it, until ya sunk it

You like using cut off wheels? Or just like torture? SS nylocks are bad enough.

[RSWORDS]

Merc would ask to see the pieces still bolted to the boat.....

With Some of the insurance battles I've seen.... they would want the motor if possible.

[XstreamVking]

You have to eliminate movement with the slamming those motors are getting. They make grade 8 metric bolts in SS.

[Forkin' Crazy]

They make grade 8 metric bolts in SS.

What is a source? Fastenal has nothing.

[XstreamVking]

These guys have them.
https://www.bumax-fasteners.com/

[Forkin' Crazy]

These guys have them.
https://www.bumax-fasteners.com/

How much is that??? LOL!!! And who uses it in boat rigging??? Surprised it wasn't aerospace!!!

I am not an engineer. Who can translate this?



https://www.bumax-fasteners.com/prod...olt-and-screw/

[XstreamVking]

They are used in lots of applications and have dist. in the US. If you want the good stuff, you can't get them at ace hardware....

[Forkin' Crazy]

They are used in lots of applications and have dist. in the US. If you want the good stuff, you can't get them at ace hardware....

Okay. I'll venture a guess.. you don't know.. Last I checked Fastenal wasn't Ace.... SMH...

[CUDA]

So Fastenal said they can't get you a better grade? I thought the Merc ones were good? Don't believe this was the bolts fault here, negligence.

[XstreamVking]

I was kidding about ace. Fastenall has the stuff everyone uses. These are specialty bolts. But anyway, stainless hi-grade bolts do exist.

[LakeFever]

321 alloy bolts iirc are the good ones to use. Low gall, high strength. I believe there is also 410 or something like that but not as corrosion resistant.

Red locktite lol, yeah need some heat to crack loose. Same with nylocs a bit of heat helps a LOT but one time use. There are those distorted nut lock nuts as well as the sliced/pinched ones. All one time use with stainless imo due to the thread galling BS