Detroit 6-71

There's also a massive wind/belt noise from the fan/radiator. It's the type of unit you want to dig a pit into the ground and build a sound deadening air exchange unit over to keep the gawdawful noise down. Even tiny generator noise is the pits. It' -so- pervasive, driving right through walls, insulation, and windows.

Reply to
Larry Jaques
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That's why LEDs are so great. Their illuminative power is 10x that of incans, so a 100w LED would take the place of each 1kw bulb from the past.

Hurry, call in FEMA!

There ya go!

Reply to
Larry Jaques

Exactly

Reply to
Ignoramus29663

In some installations, it's not bad. I've fished at Plummer's Lodge in the NWT, where they have a 2-71 running 24/7 to supply power to the camp (they have two of them; one runs, the other one is backup when the first is down for an oil change or whatever). I slept in a plywood shack right next to it (it was in a plywood shack, too) with no trouble. You could hardly hear it.

Or, maybe my hearing was going bad.

Reply to
Ed Huntress

About half the noise of a "normally" mufflered 6-71 comes from the vibrations of the block. A guy in my home town used to have a '58 GMC dump truck with a 6-71 in it and a hi-hoe with either a 3-71 or 4-71 (can't remember, we are talking back in the late sixties) He had a honking big muffler mounted to the dump box - it was still loud on the road, but NOTHING like when he raised the box. He'd hi-tail it out of town with the hi-hoe dragging behing (front bucket over the tailgate of the dump truck) and you could hear him going up the hill clear across town. Then he started towing his little Chevy LUV behind the hoe for jobs where he didn't need the dump truck, and the hoe raised a real ruckus too. He used to dig wells with the hoe - you'd see a ring of dirt in the middle of a field, with black smoke pouring out of it, and an unholy racket you could hear for over a mile. Then all of a sudden you'd see the hoe pop out of the hole, hoe end first, riding on the front bucket. He levered the hoe out of the hole alternatel pulling with the hoe and curling the big bucket.

Reply to
clare

My 9kw peak, 7200 run Champion runs a 440 cc OHV, and only puts out

5500 on LP or Natural Gas. It is supposed to be a "`12 hp" engine.
Reply to
clare

The seal on the exhaust side could let go too. The GMC bus I rode on a tour of the Yukatan in Mexico back in '75 blew an exhaust side seal and went through 15 gallons of oil between Guadelara and Mexico city - you couldn't see a thing behind the bus, and it was way down on power too because the turbo was binding and not providing much boost - basically running on the blower.

Reply to
clare

I was warned about this runaway stuff when I bought (for resale) a Detroit 3-53.

So, to be on the safe side, I got myself a piece of plywood to cover up the intake.

Guess what happened, it started "runaway" as soon as I started it. I was damn lucky that I had that plywood. Even with plywood covering the intake, it barely stopped.

I later found out that it was due to stuck governor lever or whatever it was regulating speed, I unstuck it and the engine was fine.

i
Reply to
Ignoramus29663

I consider all comparators to be garbage , buy them only for garbage prices.

Last one I bought for $50 and sold for $700.

i
Reply to
Ignoramus29663

I think I may have seen this runaway behavior once on the freeway. My wife and I were traveling behind a semi tractor some distance back and as the freeway started to climb a hill it naturally slowed so we started gaining on it. Then all of a sudden TONS of blue black smoke started pouring out of the exhaust and the truck started going up the rise much faster. We eventually passed the truck. It was three lanes over and we didn't get a clear look at the driver or the truck to see what was happening but it sure was weird to see so much smoke pouring out of that exhaust pipe. Eric

Reply to
etpm

I know, but I hate them for ugliness.

i
Reply to
Ignoramus29663

You might appreciate their looks better if you watched an expert toolmaker use them to produce a complex leadframe punch-and-die set accurate to +/- 20 millionths of an inch, as I have.

Think of it as form following function.

Reply to
Ed Huntress

Not to make a problem, but I saw a motor on a low boy today. A heavy hauler low boy that was.

The motor was new (paint was anyway) about 8 or 9' tall and had 4 very large filters on one side. It was Yellow so it was likely for a John Deer Tree Machine or Dozer. A big bulldozer! It looked like a cube. Big sucker! Fuel drains fast!

Mart> I bought this generator in auction for $300 plus BP:

Reply to
Martin Eastburn

Bet that was scary. Maybe keep a tank of Argon beside the next startup to starve it of oxygen.

It makes me wonder how long it ran like that for the last owner.

Reply to
Larry Jaques

Just do a youtube search on "run away diesel". Heartbreaking stuff...

Reply to
Leon Fisk

"but still check out those bearings in the turbo" ? Did you not mean to check out the bearings on the blower? I believe that would likely be the bigger problem on an old Detroit.

Reply to
Garrett Fulton

Garrett Fulton fired this volley in news: snipped-for-privacy@googlegroups.com:

No; given the relative speeds of operation, and their temperature domain, those in the turbo are the more likely ones to fail early. To my knowledge, we never had a Roots failure in our two divisions of Swift boats, unless one got shot up.

They were rebuilt every time a boat went in for overhaul, but every moving part in the engines was replaced or re-machined then.

Also, on that thing about the runaway condition -- I think it was on the Mark II boats (real pigs in performance) that they started putting a manual damper over the blower inlet, so if the engine mate was fast enough, he could shut one down very quickly. Prior to that, the only solution was a very dangerous one... he had to jump down into the compartment (between the two engines) spin off the injector cover nuts, and slam the rack by hand! It could have been the Mark III boats where they began to add that (luxury yachts compared to the Mark I boats!)

Lloyd

Reply to
Lloyd E. Sponenburgh

It likely ran perfectly before being put into indefinite storage without proper preparation

Reply to
clare

A mechanic tried to stop a runaway deisel on an AC back-hoe loader by stuffing a pair of coverals into the intak. They came out the exhaust in a cloud of cotton dust -it stopped when I swung a 2X6 at it.

Reply to
clare

It probably did not, it got its speed regulation mechanism stuck due to sitting around.

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Reply to
Ignoramus5626

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