Lister Engine Forum

Slow Speed Diesel Engines => Other Slow Speed Diesels => Topic started by: Tanman on November 02, 2019, 02:58:43 PM

Title: Onan 9 MDKAV
Post by: Tanman on November 02, 2019, 02:58:43 PM

So I just unexpectedly won an online auction for an Onan 9kw MDKAV marine diesel genset. 1800rpm low hours 3 cylinder Kubota powered. However it needs a raw water supply to run, has anyone tried adapting something like this to stationary use? The inlet is only a 1” tube for the raw water intake this heat exchanges with a closed coolant system on the genset. Open to creative ideas and will post pictures once I go pick it up.

Title: Re: Onan 9 MDKAV
Post by: 32 coupe on November 02, 2019, 09:51:57 PM

I have something similar and removed all the marine cooling and use a Honda radiator with a fan.
Works great. The radiator was purchased on Ebay for a few dollars. Aluminum racing part.

The exhaust manifold was replaced with one from a tractor that used the same engine.

When you have to buy the impeller for the raw water pump you will thank yourself.

Title: Re: Onan 9 MDKAV
Post by: 32 coupe on November 03, 2019, 02:48:20 PM

This is before I installed the exhaust manifold but you get the idea.
You can see I also used the ST type gen head.  It's an early one with good windings and stable voltage.

Most marine units are "ditched"  because the gen head goes bad.

Title: Re: Onan 9 MDKAV
Post by: 32 coupe on November 04, 2019, 04:45:13 AM

Thanks Glort,
That gen set has a Mitsubishi engine. I think a k3d. I have now install a custom fuel tank as well as gauges
and wiring. I'll try to post a pic tomorrow.
It has about 1000 hrs on it and I got it for nothing with a dead gen head and after checking the cost of a
rewind I decided to build this. I had the st head from another project.

I have a 2 cylinder that has a factory remote head with controls and gauges with only 50 hours but it too has
a bad gen head.  Been looking for a 5kw Stamford clone head for it.

So many projects and so little time.

Gary

Title: Re: Onan 9 MDKAV
Post by: 32 coupe on November 04, 2019, 09:05:03 PM

Still needs a little more paint work but runs fine. It's been a project for several years now.
No point in getting in a hurry!

Title: Re: Onan 9 MDKAV
Post by: Tanman on November 05, 2019, 03:31:41 AM

32 coupe, that is an awesome setup, I’ll post some pics of mine when I get it here. Glort , thanks for the tip I’ll start doing some digging see if I can find some common issues, would you mind asking your brother in law to see what his were and what happened?

Title: Re: Onan 9 MDKAV
Post by: Tanman on November 13, 2019, 03:15:38 AM

Got it home today, have to check a few things and hook up some fuel to test it out!