Advice on crankcase torque sequence RDE 18 30 hp

[scratcher]

Can someone give me the proper torque sequence for these motors?  Looks like the larger six bolts surrounding the bearings get 13.5 to 14 ft- lbs.  Not sure about the smaller outer flange bolts.  Should the larger center bolts be step torqued up to full before doing the flange bolts? Thanks for any help

[scratcher]

I think I’m going with this sequence if nobody corrects me today.  847 sealer and perfect seal on bolt threads…Look OK?

[RICHARD A. WHITE]

Is that the head for this motor?

http://www.richardsoutboardtools.com
classicomctools@gmail.com

[scratcher]

It’s the crankcase bolts for a 56 Johnson 30 hp.

[RICHARD A. WHITE]

I thought that was to use anerobic sealer? May have mis-spelled that…
We use 847 on gearcases and such

http://www.richardsoutboardtools.com
classicomctools@gmail.com

[scratcher]

It says sealer 1000 in the 10 th edition.  It has the spaghetti seal.  I thought that meant go with the 847, but I would gladly use something else if I got the ok to use 518 or equivalent. Thanks

[RICHARD A. WHITE]

I just wanted some mental clarification… this is the front half that holds the crank shaft…correct?

http://www.richardsoutboardtools.com
classicomctools@gmail.com

[scratcher]

Yes the 6 larger bolts surround the 3 crankshaft bearings and the spaghetti seal is inside the smaller bolts ending at the upper and lower crankshaft bearings. So one spaghetti seal on each side.

[Sam M.]

scratcher wrote:

I think I’m going with this sequence if nobody corrects me

I would be tempted to go in the order of this list of your numbered bolts:

1, 2, 3, 5, 4, 6, 8, 10, 7, 9, 12, 14, 11, 13 or something like that so you are tightening in diagonal opposites as much as possible.  Note after 1 and 2 how the numbers are odd, odd, even, even… so you maximize the amount you can tighten in a diagonal sequence.  I would think a simillar way like that (odds and evens) based of off your diagram should be equivalent.  By doing it this way, you aren’t tightening in a circular pattern like 3,4,5,6.  I believe doing it diagonally is supposed to produce less warpage than circling, however I’m not reading this out of a manual for your motor.  Good on you for putting so much thought into torquing though!

[scratcher]

Sam M. wrote:

scratcher wrote:

I think I’m going with this sequence if nobody corrects me

I would be tempted to go in the order of this list of your numbered bolts:

1, 2, 3, 5, 4, 6, 8, 10, 7, 9, 12, 14, 11, 13 or something like that so you are tightening in diagonal opposites as much as possible.  Note after 1 and 2 how the numbers are odd, odd, even, even… so you maximize the amount you can tighten in a diagonal sequence.  I would think a simillar way like that (odds and evens) based of off your diagram should be equivalent.  By doing it this way, you aren’t tightening in a circular pattern like 3,4,5,6.  I believe doing it diagonally is supposed to produce less warpage than circling, however I’m not reading this out of a manual for your motor.  Good on you for putting so much thought into torquing though!

Yes I would normally think to do it like you have it.  I vaguely remember seeing or reading somewhere about circle pattern on this though but, of course, can’t find it now.  Regardless this seems a little more stressful than most with 847, spaghetti seals, 14 bolts, 2 different final torques in less than 10 minutes.  No wonder I can’t find a video on this.  Probably gonna be some cussin.

[Author]

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