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  Topic Review (Newest First)
05-13-2015 03:40 PM
brownoarsman
Re: Universal to Kubota Parts list?

Hi Mark,
My boat is certainly not worth what you quoted, and while I won't be sure until I get the head off (it's stuck to the block pretty securely and is soaking in Sea Foam now), I seriously doubt that my engine has 15 years left in it!

Here is the manifold listed at Torreson if it could help you (for $550) Universal 300418 Sailboat Supplies, Engine Parts and Boat Parts

At least on my engine, the rubber exhaust hosing doesn't begin until after the water is injected (the riser is made of iron) and the water would mix with the exhaust down the last fall in the riser, passing through four inches of rubber exhaust hosing, and combining in the water muffler. I'm honestly interested in Rafael's experience running a dry manifold as the alternator and starter are very close to the exhaust manifold and I'm curious as to whether they've suffered damage! My manifold is probably okay right now (getting it pressure tested at the machine shop when I take the head in) but curious as to how it worked out for Rafael.

Also, Rafael, did you have any issues getting your head off? Mine seems stuck on with superglue (most likely due to saltwater corrosion around one of the studs and a bolt). I've tapped it with a rubber mallet, hauled on it with a block and tackle, poured sea foam down the stud/bolt holes, and turned the engine over with the glow plugs and injectors in trying to get the compression to blow it off - but no luck. Please share any tips you used!
05-13-2015 03:10 PM
MarkSF
Re: Universal to Kubota Parts list?

Quote:
Originally Posted by brownoarsman View Post
Hey Rafael - I was looking at the same thing and received the same dire warnings about running a dry manifold. Is yours still working alright - did you insulate it at all with wrap? Are you running at cruising rpm (2400 rpm) for sustained periods (multiple hours in a row vs. just exiting harbor?) I assume you've just led a hose from the top of your block to your mixing elbow to inject the water into the exhaust. Thanks!
The issue with a dry manifold is not so much the radiated heat, it's the exhaust temperature entering the rest of the exhaust, which is made with RUBBER hosing. In fact, wrapping the exhaust manifold will make the exhaust gases HOTTER.
05-13-2015 03:07 PM
MarkSF
Re: Universal to Kubota Parts list?

I've no idea where you got $500 from, for the marinised exhaust manifold. As far as I know, they are not available new for any price. In fact, if you know where to get one, let me know, because I'll buy one right now.

Cost of boat : $45,000

Cost of re-power : $15,000

and you're panicking about $500 for a manifold, which might extend the engine life by 10 years?
05-13-2015 03:02 PM
brownoarsman
Re: Universal to Kubota Parts list?

Quote:
Originally Posted by rafael block View Post
My manifold is toast and I'll be d@mned if I'm going to pay $500 for a new one! This is ridiculous! After inquiring here on sailnet and being warned my engine would turn into a nuclear reactor without the exhaust manifold water jacket I wound up bypassing the manifold jacket entirely (corrosion blocks the internal passages backing everything up resulting in engine overheating) and so far it's never glowed red or set the 'glass deck above it on fire.....but sure, I'd like to replace it and have it work as it should, but $500? smh
Hey Rafael - I was looking at the same thing and received the same dire warnings about running a dry manifold. Is yours still working alright - did you insulate it at all with wrap? Are you running at cruising rpm (2400 rpm) for sustained periods (multiple hours in a row vs. just exiting harbor?) I assume you've just led a hose from the top of your block to your mixing elbow to inject the water into the exhaust. Thanks!
12-16-2014 12:21 PM
masterofnone
Re: Universal to Kubota Parts list?

Gotta love the farm tractor pricing. Universal price for a glow plug $81,` farm supply price $13
12-16-2014 12:17 AM
Capt Len
Re: Universal to Kubota Parts list?

JJJ sometimes it takes the heating and bending a 12 point box wrench to get at the cap bolt ends. but it can be done.Get all the caps off and carefully lift the entire crank.The con rod bolts can damage the journals. Then tap each rod.Watch for ridge wear at bore top before you damage the ring lands Worth saving ?? your call but giving up ???
12-15-2014 10:17 AM
jjjjonny Ok. Sorry i do see the z500 on the dipstick. I thought i was going to see a cereal number. The kubota dealers wont help me without it and i cant see it anywhere. All The labels are worn off and i dont see any numbers embroidered on the actual block other than the 508 cc. Most threads ive read people say they see the cereal number on the side of the block but i dont see it.
I was able to get a rebuilt block to replace the frozen one that i pulled out of my boat and right now im piecing together the parts that are salvageable. The original block im still working on unsiezing. The conrods are in a position where i cant unbolt them to beat the pistons out without turning the crankcase which doesnt seem to be going anywhere. Not sure its worth saving.
12-15-2014 09:01 AM
mrhoneydew
Re: Universal to Kubota Parts list?

Your 5411 is a Kubota z500 block. It was used in their B5100D and B5100E tractors. Still haven't gotten around to rebuilding mine, but last February I received a quote from Sid at Kumar Bros (www.kumarbrosusa.com) for bearings, pistons, etc... basically a rebuild kit minus gaskets... for $259 with free shipping. At that time everything was in stock. Hope this is helpful. Keep us all posted as you go along with this! Mine is still out there on my project list.


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12-12-2014 01:44 PM
jjjjonny
Re: Universal to Kubota Parts list?

mr Rafael Block i also have a 5411 that i'm rebuilding right now. i have 2 dipsticks and neither have an imprint number on them. Is there another way to know the Kubota model number?
11-11-2014 09:18 PM
Firehorse
Re: Universal to Kubota Parts list?

Hello guys, my motor is running again. I had to use another tank to start it since there was no access to the tank and I couldn't clean it, yet. I bled at two bleeding spots and sprayed a little ether into the intake and it fired right up. It then started easily several times so I think it'll be ok. The gauge reads 670 hrs, too good to be true but I hope they are real.
I am going to need some help though with my transmission. I've ran it dry. I've had this sailboat for more than a year but when I brought it home I motored it 60 miles flawlessly. I then took it for a sail a couple times and motored it a bit. Finally I forced it in reverse when trying to set a three way anchor setup and stopped the motor only to find the shifter frozen the next time I went to move it. I can only shift hammering the shifter at the transmission. It will move forward and reverse only when hammering fron the transmission, the remote shifter by the wheel isn't able to shift. I am planning to remove the motor to get to the transmission so I can take a lloik inside and see what is wrong. Is there any information on these transmission, will I be able to get parts for it?
I haven't been able to find any info on the tranny. Do you know anything about them?
Thanks again for the help!!!
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