Chrysler M47

[brent stella]

Hello gang. I bought a 1955 Chrysler M47 that I am going to put into my 1956 18' Century Resorter.
The motor did not come with sending units for the oil or temp. Does anyone know where I my be able to purchase these?

[Bob Smalser]

NAPA.

Check them first, but I'm sure the pipe threads in the block will take most common sending units. Sometimes an plumbing adapter is needed.

[brent stella]

Thank you Bob, I guess I should have thought of the obvious.

[Matt Byrne]

Brent,

I have the same engine. You can download a manual at http://ccmanuals.com/engine.htm. You may be able to find part numbers that NAPA can use.

Here's a pic of mine after a new paint job. You can see the oil pressure sender on the right
http://www.mrbtech.com/DCP_2632.jpg

[brent stella]

If I go into NAPA for this part what motor should I tell them that I have? I think if I tell them that I have a Crysler M47 they're not not going to know what I talking about. What was the automotive version of this called? A 1955 Crysler 265 inline six?

[capt jake]

If you can find a 'good' parts person, they should be able to look it up by your specs. Meaning, if you give them the thread, guage or warning light, pressure and/or temperature activation, they should be able to locate a suitable replacement. Sending units are a very simple device with little variation other than matching it to your guage or light.

[Terry Rhoads]

I believe many of the parts for that engine interchange with a Dodge truck of 1&1/2 ton or greater rating of the same vintage, and also a Chrysler industrial engine. Some parts, mainly electrical, will also interchange with smaller Dodges, Plymouths and Chryslers. Our local NAPA also has some marine listings. But capt jake is right, the senders should have wide application and they should be able to fix you right up.
-Terry

[brent stella]

I went to NAPA last night and gave them all the info I could on the motor, but it didn't help. They what to know what car had that motor in it because that seems to be the only way to look it up. I'll try and tell them to check the pickup line of those years. Once I find out I'll let you guys know.

[Terry Rhoads]

Hey wait a minute- I just realised this is a trick question. I'm pretty sure that engine would have originally had mechanical gauges, not electric (at least the trucks did), so NAPA won't have a listing for original senders. Oil pressure had a small oil line that went to the gauge, temp had a capillary tube with a bulb at one end, that was all part of the gauge. Still it should be easy to convert to electrics, maybe you need to find a more sympathetic parts guy, or store. Or ask Matt Byrne what he's using on his.
-Terry

[capt jake]

They what to know what car had that motor in it because that seems to be the only way to look it up. This goes back to my original comment, "find a good partsman.". Most of them nowadays can only use a computer, they don't even know what a catalugue is used for. :rolleyes:

What Terry said is also probably true, they were mechanical.

What guages are you using? Many aftermarket manufacturers offer a wide range of senders that are compatible with their guages. What thread type will you need for the sender? My guess is 1/4NPT but you would need to verify.

[Bob Smalser]

They are mechanical gages with pipe-threaded sending units.

Get a thread gage and measure those pipe threads so you only have to buy those senders once.

Or...buy a selection of pipethreaded fittings and test the threads...then return the fittings and pay any restocking fee.

[Terry Rhoads]

OK, I'm going to reveal my ignorance and ask a dumb question: why is Matt's engine set up "backwards"? The transmission is on what would be, in the truck, the front end (with timing gear, opposite to the flywheel and starter). This would reverse the rotation of the prop shaft. Were all M47's set up like this? Is this maybe one half of a twin engine set-up? I went to the site mentioned (you have to type in the address, the link doesn't work) but the manuals are no longer a free download, you have to buy a $10 CD.
Don't mean to hijack the thread, but it does relate to that engine.
-Terry

[Dan_W]

Brent,
I've done truck and automotive repairs for 20 years. A lot of the stuff I have done has been on equipment that is not what you would call "standard". Find the crustiest parts store in the area and talk to the oldest guy there. That's the guy that knows how to use a catalog. If you intend on using mechanical gauges that would make things easier. The pipe thread will most likely be 1/8" npt or 1/4" npt. If you are installing new instruments Stewart Warner sells some good stuff and have some models of gauges that look pretty classy. If you are reusing the original Century gauges and they are mechanical it should be a pretty straight forward process to make them work.
Dan

[John Kohnen]

Originally posted by Terry Rhoads:
OK, I'm going to reveal my ignorance and ask a dumb question: why is Matt's engine set up "backwards"? The transmission is on what would be, in the truck, the front end (with timing gear, opposite to the flywheel and starter). This would reverse the rotation of the prop shaft...
-TerryReal marine engines, and truck or industrial engines set up like real marine engines, have the flywheel forward so they can be set lower in the boat. The engine tips down towards the stern, so the flywheel is at the high end where it is less likely to get in the way of a frame or floor. Propellers are mostly right hand, turning clockwise when you look at them from astern, so if you take the drive from what used to be the front of the engine when it was in a truck it will be turning the propeller the right way without having to reverse the rotation of the engine.

John

[Peter Malcolm Jardine]

If the sender looks like I think it does, then it's a Stewart Warner... round with a rubber top on it, and if not appears like a brass case. It has one wire connection on the top and is a small threaded pipe connection on the bottom. It connects to a small tube coming out of the oil gallery. The part number is 279-D from SW. It's still available but not common. NAPA should have the cross reference book to SW numbers.

The water unit could be a couple of things, but try 280-EA SW. It's threaded on a 1/2 inch? pipe thread with a single connection at the top.. Does that sound like it?

[Terry Rhoads]

John-
Thanks for the explanation. Makes sense. I guess I've never seen a "real" marine engine.
-Terry

[corob]

http://www.partman.com/
Try this guy, I run two chyrsler inboards and been able to find everything here. NAPA also has a great selection Good luck
Corey

[Domesticated_Mr. Know It All]

These guys will know what you need and what you're talking about.

http://www.lakelandautomarine.com/

They're in Ohio but can ship anywhere.
Ask for Bruce or his son Chris.

[brent stella]

Sorry I have not replied in a while I've been busy at work. Yes, I plan on using the Stewart Warner gauges that are in the boat. Thank you to everyone who helped out. This Web site has made my restoration project easier.