Tools needed to disassemble yamaha 1800 engines

[Steve K]

Hi all,

Planning to (or at least getting my head around) replacing a broken connecting rod in my 2012 Yamaha 242. I got a copy of the service manual, and for the most part the engine comes apart without too much trouble. Mainly planning ahead, because the job will take a lot longer if I have to stop, order things, and wait for them to arrive once I start.

There a bunch of special tools called for, and they are (a) kinda pricey, and (b) don't seem to be easily available used (i.e. from ebay). I'm surprised about (b) since i'd expect other people have done this kind of thing, and I would sell these tools after they finished the job.

I'm curious about what's really needed, though.

I think I probably just need/want these:
Coupling wrench: 90890-06729 $137.45:
Crankshaft holder 7 90890-06732 $73.95:
Shaft holder 4: 90890-06721 $72.85:
Flywheel puller 2: 90890-06723 62.85:
Rotor puller 3: 90890-01080 $6.85

There's other tools in the manual section I looked at, but I'm guessing I won't need those:
- Tool to separate the exhaust pipe/muffler from exhaust manifold (looks like a pipe wrench anyway)
- Tools to insert and/or remove bearings (these seems to be the bearings in the flywheel cover, and it looks like once you get the flywheel and transfer shaft off, you can remove the flywheel cover with the bearings intact, and only need to mess with them if they're damaged.

Anyone done this before? Does that sound right?


More complete list:
Here's the list I put together after looking through the teardown diagrams:

Tools

• Exhaust pipe wrench: 90890-06726
  • Don’t need?
• Coupling wrench 2: 90890-06729
  • $137.45:
  • 
• Camshaft wrench 0: 90890-06724
  • Can’t find – probably easy to do without?
  • 
• Crankshaft holder 7: 90890-06732
  • $73.95:
  • 
• Shaft holder 4: 90890-06721
  • $72.85:
• Driver handle 5: 90890-06722
  • Not available, but it seems like anything that can turn the shaft holder would work…
• Crankshaft holder 8: 90890-06732
  • $73.95:
• • 
• Flywheel puller 2: 90890-06723
  • 62.85:
• Rotor puller 3: 90890-01080
  • Yay just a bolt but it’s cheap: $6.85
  • 

BEARING REMOVAL – I’m guessing I don’t need to do that; once I get the rotor off, I think the flywheel cover can come off (with the bearings)?

• Driver handle (large): YB-06071
  • Can’t find – improvisable?
• Forward gear outer race installer: YB-41446
  • Can’t find.
• Driver rod LS: 90890-06606
  • Can’t find in us
• Ball bearing attachment: 90890-06657
  • 
• Forward bearing race installer: YB-06258
• Bearing pressure C: 90890-02393

 

[Neutron]

I would say those tools you listed are most definitely necessary, as far as anything else needed, i would think universal tools would work.
I have been inside watercraft engines before, not the 1800, all having similar ways of getting the flywheel and shafts apart. So the only specialty tools needed were for those tasks

 

[Dixemon]

I would agree with most of the special tools except the camshaft holder. I'm not coming from experience with the teardown of the 1800. But i made a camshaft holder to turn the tr1 cams to check timing. Although it was not needed. it is actually better to turn the crank with a strap wrench. I only see that necessary if you have to change the cam sprocket, then again you could figure out a way to hold the sprocket and torque the attach bolts prior to assembling the head. I'm sure there is some DIY teardown/buildup videos out there to get a good understanding of the process.

 

[Brad_Ct]

Before you buy from Yamaha compare prices with SBT and Riva Racing, I bought a flywheel puller from SBT for a lot less then what Yamaha wanted.

 

[NicholasM]

Hi all. I am beginning to pull the starboard engine from my 2013 AR240 and found this thread helpful. Couple quick questions:

1. Does the hood need to come all the way off, or will it safely hinge back when the struts are removed? (With nice support, of course)

2. How does the coupler between the engine and jet drive disconnect?

3. Anybody know the weight of the short block (without head or manifolds)?

Thanks in advance!!

Nick