Jackplate to transom bolts info needed.

[grout-scout]

I replacing the motor bolts and resealing my entire transom, the bolts are 5 3/4" and the ones I see in the kits are 4 1/2". Can anybody tell me the type of stainless steel bolts I need? I'm guessing the ones from the box stores don't have the same hardness or quality???

[95202DCX]

I went by the standards of Mercury bolts and had FASTENAL source them for me.

[ANDYE]

Only place I could find them was a Merc dealer, of course. They should of been gold plated for what they charged !!

[grout-scout]

So they have them in 6", the merc site is lacking in details. Guess I'll have Don Weed order me some.

[bruce']

I got mine from ACE Hardware. When i got my new motor they sent me new ones. But i misplaced them and had to go to ace and get new ones. There is nothing special about the bolts. I boug5.5 inch

[95202DCX]

There is nothing special about the bolts.

That's just bad info....

use FINE THREAD bolts, correct hardened bolts, and fine-thread BRASS Nylock nuts. If unsure, use the APPROPRIATE hardware specified for your engine.

55lb.s of torque transom to motor/jack plate...90lbs of torque motor to jack plate.

[bruce']

Yea i just realized that they were fine thread. With the nylon locking nuts. There are stainless steel. I did assume he was just wanting to buy longer bolts of like kind. MY Bad

[grout-scout]

I think the ones on my boat are some junk ones from a hardware store, at this point I'm really doubting anything previously done to this boat with what I find on every closer inspection. I know they look nothing like the ones on Mercs site.


Thanks for the torque specs 95202.

[Charlie206]

17-4 stainless should be roughly comparable to grade 8 steel. But you won't pay hardware store pricing.

[BigMouth]

Lea's advice would be to tighten the nut not the bolt. But you probably already knew that, Good luck.

[Fidgetcranker]

You can get hardened bolts and all hardware at Tractor Supply

[grout-scout]

You can get hardened bolts and all hardware at Tractor Supply

Do they have stainless in the right quality though.

Cost is irrelevant at this point and if 17-4 would work it would sure make my search easier. It would also be easier if someone had a kit with the right size, 6" seems to be unnormal.

[86 inches]

Here are Evinrude recommendations and part number:

Material: SS; Group 1, 2, 3 per ASTM F593 OR Grade A2 per ISO 3506-1. Strength: Minimum proof load.

336676 4.75" 1/2-13 min proof load (lbs.) 12,771
331578 5.00" 1/2-13 min proof load (lbs.) 18,520
354101 6.00" 1/2-13 min proof load (lbs.) 18,520
354102 7.00" 1/2-13 min proof load (lbs.) 18,520

marineengine.com has the 6"
http://www.marineengine.com/newparts...rt_num=0354101

[86 inches]

They aren't cheap!

[95202DCX]

You can get hardened bolts and all hardware at Tractor Supply

CHINESE CRAP ALERT!

[Champ2005]

For something as important as a jackplate, maybe your idea of having Don Weed get you the appropriate bolts is warranted?