Motor mount too hull Torque??

[dirkdiggler]

how many ft. lbs of torque for the 8 bolts that hold the mount to the hull??? Cant find anywhere for what yamaha recommends for an FX-1 or superjet????

When you place the motor on the engine mounts and only hand tighten the 4 motor mount bolts there is alot of play if you grab the motor and move it around every which way. The bed plate hole is pretty large and alows some movment that seems like it could throw the alingment off!

12 ft. lbs of torque on the motor mount bolts does not seem like enough to prevent the motor from moving around from vibration on its own?? Does what im asking make sense?

 

[Matt_E]

Search.

It's been covered just 2 days ago.

 

[dirkdiggler]

i only see what kawasaki recommends which is 25 ft. lbs of torque. I just wanted to know what yamaha recommends??? Rubber mounts too hull torque??

What about my second concern with the motor bed plates alowing major play??

 

[SXIPro]

http://www.x-h2o.com/threads/34479&highlight=torque

Are you sure you didn't lose/misplace the shims? maybe that is why it seems like it is flopping around too much?

 

[Matt_E]

I could tell you, but you're just going to do the opposite anyhow.
I see it as useless to give you advice.

 

[dirkdiggler]

Thanks SXIpro, but I already read that, it only says what kawi 650sx recommends wich is 27 ft. lbs! looking for yamaha recommends??

The motor doesnt flop around up and down. Im talking about the possibility of it shifting left to right or front to back??

The motor mounts have a skinny hole in them that takes a pretty skinny bolt! the motor bed plate hole is much larger which could allow for movement. Taking a skinny bolt and putting through the large bed plate hole and only torquing it down to 12 ft. lbs seems like after a large jumd or hard jolt could alloe the motor to shift around? The top on the motor mount is smooth while the bottom of bed plate is smooth also. Two smooth surfaces on each other under 12 ft. lbs of torque doesnt add up??

 

[SXIPro]

When I get home tonight I'll check the torque on my SN and RN and see if they are consistent. The SN motor has never been out, and the RN motor has but was reinstalled by someone that knew what they were doing(not me). I don't have an FX1 to check, unfortunately.

 

[dirkdiggler]

thanks

 

[azreark1]

just tighten it up to 25ft/lbs and be done with it...kawa and yamaha arent going to be very different...maybe a few ft/lbs or so but not enough to make a difference. And dont worry abotu how the bedplate holes are...they are like that from the factory and everyone else has the same thing and no problems so dont worry about it...its going to shift and thats what the RUBBER motor mounts and rubber coupler is for.

Make sure you shim the thing.

 

[Matt_E]

Just where are you getting 12 ftlbs anyways?

The value for the single motor mount bolts was listed on the linked page in this, your, thread.
Did you bother to read it, after asking for it?

As for the actual mount bolts - there is no recommended torque value for those, it seems.
Just get'em tight.

 

[oxnard111]

Just where are you getting 12 ftlbs anyways?

The value for the single motor mount bolts was listed on the linked page in this, your, thread.
Did you bother to read it, after asking for it?

As for the actual mount bolts - there is no recommended torque value for those, it seems.
Just get'em tight.

Tight with anti seize I say.

 

[dirkdiggler]

the superjet manual says 12 ft lbs of torque for mounting the engine too the motor mounts.

 

[Matt_E]

ORLY?

Here's the manual page.
You're right, it's 12 ftlbs, I was looking at the Nm figure. (17)

 

[Matt_E]

Also, check page 5-14 of the same manual.

Where TF are you getting 12???

 

[Scraggly]

dude you not fixing a base gasket, why are you torquing engine mounts?????
put em tight thats all you need

 

[oxnard111]

Matt... I see it right on the PDF page you linked... You circled NM, but two boxes to the right it says "12 ft lb"

 

[Matt_E]

17 Nm....isnt' that what everyone uses? :loser: <-me

Ok. Gotcha.


Dirk, if you can really slide the engine around after tightening it to torque specs, there are a couple of possibilities:

1. You're not using washers.
2. You're not using the right bolts (too long)
3. Your motor mount may have something wrong with it.

 

[WFO Speedracer]

Tighten it down till it strips then back it off a quarter turn.Sorry just trying to catch up with Matts post count.

 

[dirkdiggler]

When I hand tighten the bolts I can moves the motor around left/right - back/forward. the motor mount is flat and slippery and where the bed plate mounts up is flat also. 12 ft lbs isnt alot of torque, is it???

when I torque all the bolts down too 12 ft. lbs I cant move it by hand but I am worried that if I lauch off of a wave and land sideways, a jolt like that could cause it too shift/slide with only 12 ft. lbs of torque holding two smooth surfaces together??

I am not trying to push back on the topic or anything, I just dont think people know what I am trying to say??

I am using 2 shims and all bolt have washers!

 

[D-Roc]

if your shimmed and aligned and have the washers on then torque it to 13 lbs for piece of mind. the rubber mounts will let the motor move easier than the bolted down mating surfaces.