Rebuild

[NautiHippie]

Hi All,

We have a Tiara S2 9.2 that needs an engine rebuild. It has a Yanmar 2QM15 2 Cylinder engine in it, prop and shaft are perfect. Some seals are bad, the injectors are shot, and a rocker arm is bad, and we are getting ready for an extended cruise and would like to have peace of mind. What would a ball park figure be for this rebuild? I'm figuring $2000 - $3000 is this about right? Also if you know of anyone good in the Miami area please let me know!

P.S. I already have it torn down to the block but don't have the mechanic skills required to rebuild


Thanks,

Nauti

[never monday]

skip the rebuild, repower it. The new engine will be lighter, more fuel efficient and sound.

[NautiHippie]

If I repower will be doubling the cost? As I would probably need a new shaft, prop, and it is in a small space under the chart table so size is a factor. What engine would you suggest if repowering, the 2QM15 seems to have more than enough power to push the boat.

[never monday]

you won't need a new shaft. You'll need a new prop, IIRC the QM uses a left hand prop. Most everything new is right hand.

A 2YM15 Yanmar is smaller than the 2QM15 you have.

[NautiHippie]

What would the repower cost roughly if i went to the 2YM15? Thanks again for the help

[never monday]

Originally Posted by NautiHippie

What would the repower cost roughly if i went to the 2YM15? Thanks again for the help

it depends on how much you are willing to do yourself and have the ability. I don't know you and your mechanical aptitude.

[NautiHippie]

It would be fully on the vendor not much mechanic in me

[klem]

I would call around to the local rebuilders and see what it would cost. I have not rebuilt an engine that small so I can't give you an accurate price but if you pull the engine and strip all the peripherals, $3k should be in the ball park.

Regarding repowering versus rebuilding, rebuilding is a lot easier and cheaper. A repower requires new motor mounts, exhaust, fuel plumbing, raw water plumbing, often changes to the throttle, sometimes a new shaft, often a new prop and all of those things take a lot of time. If the current engine does its job well and isn't underpowered or noisy, I would stick with it.

[never monday]

Originally Posted by NautiHippie

It would be fully on the vendor not much mechanic in me

I can't say much then. I'm not familiar with the market in the Keys. There are some reputable Yanmar guys down there.

[never monday]

Originally Posted by klem

Regarding repowering versus rebuilding, rebuilding is a lot easier and cheaper. A repower requires new motor mounts, exhaust, fuel plumbing, raw water plumbing, often changes to the throttle, sometimes a new shaft, often a new prop and all of those things take a lot of time. If the current engine does its job well and isn't underpowered or noisy, I would stick with it.

A repower requires new motor mounts, - all the engine companies include new mounts

exhaust, - typically the hose is the same size

fuel plumbing, - typically the same size, age related replacement is different.

raw water plumbing, - again typically the same size

often changes to the throttle, - rarely required

sometimes a new shaft, - more often no.

often a new prop, again, only if it's a rotation change or major HP change.

[r.furborough]

Try contacting Luis Garcia at Marathon Diesel He is a Yanmar dealer and can offer advice on whether your existing engine is rebuildable, rebuild it if it is OK or offer to supply and install the latest Yanmar replacement.

[NautiHippie]

I'm going to wait till the weather is better later on this week then I'll sail down and check him out. Thanks!