Westerbeke W33 block origin?

[sailah]

Originally Posted by samfreeland

I have a four cylinder westerbeke I thought was 44hp I'm still not sure what it is. It had ingested water through the exhaust in to the head which is apparently a common accurrance with them ? It came with a brand new spare alternator and starter motor injectors hoses maybe 30 filters recon kit headgasket ect. I picked it up in pieces for $475.00 NZ dollars. I see one is being parted on the NZ Trade me site it has ingested water in to the head as well ?

I have a 44 hp Westerbeke, mine is a 44B. Has S4L2 cast on block because it's a Mitsubishi block. See if you can find a casting number on it.

[samfreeland]

I thought this was a 44b but I can't find it on the block.

[ikebartlett]

https://www.westerbeke.com/replaceme...de%2011-11.pdf
This should help

[ikebartlett]

44A FOUR is the closest

[samfreeland]

Cheers.

[sailah]

I will guarantee that's a Mitsubishi block as I just had mine torn down to where you are.

Based on the tag is 1.8L (actual on S4L2 block is 1.758L) so that would equate to 107.3 cu in.

So a 44A or 44B is likely candidate from above posted literature. Mine is only good for 3000 rpm so it looks like I'd agree a 44A is most probable.

But if you check the parts diagram, the 44A/B share the same block. Not sure why yours doesn't have casting marks though. Check the head STB side near the aft injectors and see if you see S4L cast into head?

[samfreeland]

Yes it does. Thanks for the help and engine spec chart.

[sailah]

Lastly, this is all I could find without going out in the freezing cold to check. BUt if you squint, it sure looks like our labels are the same except mine is 2002 (vs your 1999) and mine is 3000 RPM vs 3600RPM.

So that would lead me to believe yours is the previous model to mine and would following the naming structure from Westerbeke.

So I'd say you likely have an S4L2 block. I have all the factory service manuals if you want to PM me your email I can send you a Drive link.

EDIT: there are a ton of parts available on eBay, this was a very common block used in all sorts of forklifts, CAT mini-excavator, Toro groundmaster mower etc. I've found most of my parts on eBay like gasket sets etc.

[samfreeland]

Great thanks. I really appreciate that.

[sailah]

Sent you a Drive link, let me know if you have any questions.

Peter

[samfreeland]

Exellent thank you both for your help.

[Oldshipwright]

Old thread but an update for anyone who is interested.
The Westerbeke 33A is definitely a Mitsubishi KE 150 block as is the Vetus 4.14.
Here’s a pic of my block with the model number in the casting.

[ikebartlett]

The 33a engine was also used in the Mitsubishi Mighty Max pickup truck, I bought a starter and water pump at greatly reduced price and they fit and worked fine