Dale the Builder comes up with some of the most IN-teresting stuff.

This is a Yanmar Marine Diesel out of a sailboat. 1 lunger, 8HP. The boat was junk when it was hauled out 10 years ago, sitting dry didn't help it any. The motor was alleged to be new when it got parked in his field. He basically hacked the boat apart from around the engine/trans/shaft/prop and I loaded it up and drug it home.

So far I've cleaned it up, changed the oil and filter, purged the fuel system with fresh fuel and a new filter and checked to make sure the starter was working good. It has a big freakin' alternator on it and was set up with a dual battery system to run the boat electrical system.

Just need to build a temporary stand for it and I'll steal the battery out of Guido and see if we can make some smoke.

No idea what he'll do with it once it's running, probably sit in his barn for another 10 years. All the parts are there to make a neat little powered dory tho. I don't get excited about boats, but I think something like that might be fun to putt around in.

Interesting. That's a whole lot of metal for 8 hp.

quote:

Originally posted by tatortodd:
Interesting. That's a whole lot of metal for 8 hp.

Lotta stresses on a high compression diesel.

quote:

This is a Yanmar Marine Diesel out of a sailboat. 1 lunger, 8HP. The boat was junk when it was hauled out 10 years ago, sitting dry didn't help it any. The motor was alleged to be new when it got parked in his field. He basically hacked the boat apart from around the engine/trans/shaft/prop and I loaded it up and drug it home.

Too bad the boat is gone.
I've been on a large sailboat that used a similar motor when close to shore for docking and maneuvering. It was a neat set-up and made plenty of power for the purpose.

Nice, to good of a set up to not use. Maybe power a portable sawmill?

Power a generator?

With diesels HP isn't the whole story. Probably puts out a lot of torque.

quote:

Originally posted by tatortodd:
Interesting. That's a whole lot of metal for 8 hp.

Cool. More pics please


How does the injector pump work? Electric or mechanical?

Would that be good to power a generator or batteries and inverter for emergency power or for a cabin etc?

quote:

Originally posted by cparktd:
Would that be good to power a generator or batteries and inverter for emergency power or for a cabin etc?

It would require some modifications. Mainly cooling, it has no radiator. Haven't figured it all out yet, but pretty sure it pulls in sea water and pumps it overboard with the exhaust.

If that thing is 12v (or if you can source an alternator that is, adding a radiator for engine water and that thing would be the boss to charge up an off grid battery bank or a large battery bank in a camper.

Soooo much better than charging them with A/C

quote:

Originally posted by BigSwede:
Cool. More pics please


How does the injector pump work? Electric or mechanical?

Mechanical. Lift pump to the fuel filter then to a mechanical pump built into the governor and on to the injector.

Pic in a few.

quote:

Originally posted by mark_a:
If that thing is 12v (or if you can source an alternator that is, adding a radiator for engine water and that thing would be the boss to charge up an off grid battery bank or a large battery bank in a camper.

Soooo much better than charging them with A/C

Big honkin' alternator, I just assumed it was a pair of 12V batteries. Now you have me wondering. I'll check it out when I get it running.

quote:

Originally posted by PHPaul:

quote:

Originally posted by mark_a:
If that thing is 12v (or if you can source an alternator that is, adding a radiator for engine water and that thing would be the boss to charge up an off grid battery bank or a large battery bank in a camper.

Soooo much better than charging them with A/C

Big honkin' alternator, I just assumed it was a pair of 12V batteries. Now you have me wondering. I'll check it out when I get it running.

Jimmy might be able to answer some of your questions. I have to assume he'll be along shortly. He's probably seen a bunch of those.

Jim

quote:

Originally posted by PHPaul:

quote:

Originally posted by mark_a:
If that thing is 12v (or if you can source an alternator that is, adding a radiator for engine water and that thing would be the boss to charge up an off grid battery bank or a large battery bank in a camper.

Soooo much better than charging them with A/C

Big honkin' alternator, I just assumed it was a pair of 12V batteries. Now you have me wondering. I'll check it out when I get it running.

Or two 6V in series.

Fuel system: From 12 gallon poly tank -



by mechanical lift pump to -



low pressure fuel filter to -



mechanical injector pump.

I have worked on those.

First of all, if it sat for 10 years I would pull the injectors out and pour in ATF or similar oil to lube the cylinders. Do not reinstall the injectors until you have the starter turning the motor over.

Those engines bang around A LOT, but are okay above 1800 rpm or so. They are very reliable, some people really like them.

Also if it has an aftermarket alternator (powerful), you should install an alternator field disconnect switch. Keep this switch open until the motor is somewhat warmed up. Otherwise will often run in reverse (really).

Yes on the exhaust, that is what it does.

Included in the pile that came with the engine was a Dahl water separator. It had been removed with a knife so I have no idea how/where it plumbs into the system.

Advice from those in the know appreciated.

Cooling was likely by a heat exchanger with fresh water/antifreeze flowing through the block for cooling. You could rig a garden hose and run fresh water through the block for test purposes. Long term when you stationary mount it, radiator or heat exchanger in the dory can be fabricated.

quote:

Originally posted by SPWAMike0317:
Cooling was likely by a heat exchanger with fresh water/antifreeze flowing through the block for cooling. You could rig a garden hose and run fresh water through the block for test purposes. Long term when you stationary mount it, radiator or heat exchanger in the dory can be fabricated.

I did notice while I was moving it around to work on it that some antifreeze came out of the pump on the front. That confused me mightily. Is the "heat exchanger" integral with the engine?

I've worked on a couple of lobster boats that just had a loop of tubing under the hull that the engine coolant circulated through. A crude but efficient heat exchanger using ambient sea water as the medium.

Didn't see any similar fittings on the sailboat.

EDIT: Just occurred to me that the antifreeze may have been for winterization. Also, having surfed around a bit, I did see a fitting that might have been the seawater cooling valve. It was right next to the remants of the toilet so I thought it was the overboard discharge for that. I'll go back and look tomorrow.

I used to work on Cummins 902 s and the water exchange system was on the block. Sea water came into a tube bundle where it took heat away from the closed system full of antifreeze. And the seawater went out into the exhaust system...