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| Crown M7 starter and water temp |
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Message |
    
jphoenix
New member
Username: jphoenix
Post Number: 1
Registered: 02-2007
| | Posted on Saturday, February 17, 2007 - 11:40 pm: | 
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I have a 1947 Monk design 30' cruiser with a Chrysler Crown M7 berthed in Tacoma, WA. I removed the starter today because it was not engaging properly, grinding the flywheel. I found the typical dry Bendix, no lube at all, rusty. Cleaning and lubing will fix the problem - but, the placard says it's a 6 volt starter. The boat is 12 volt, but it has 2 six volt batteries in series, parallel with a 12 volt battery. I took the starter apart to clean and inspect and it does indeed look 6 volt, only two coils, not the four you see in a 12 volt. Part number is 1113864. Any reason to replace it with a 12 volt when it eventually dies?
I cruised the boat 40 miles yesterday from Port of Edmonds, WA to Tacoma, its new home. On the way, I could control the water temp from 185° to 205° with power settings and the cabin heater. What temp should this engine show at 2000 rpm? Taking it up to 2200 rpm caused the temp to climb quickly, but I backed off before it went over 205°. The boat does 7.5 knots at 2000 rpm, 2200 rpm gets another half knot maybe. It's a displacement hull, so I can't imagne it will do more than 9 knots in any case. How fast should I run this engine? Is 2200 rpm reasonable. Should it cruise at a higher rpm - or lower? I have no experience with the M7, but it sure seems to run fine. Any tips tricks or info greatly appreciated.
Here's some photos: www.jimphoenix.com
Jim |
larry_from_maryland
Senior Member
Username: larry_from_maryland
Post Number: 220
Registered: 07-2003
| | Posted on Sunday, February 18, 2007 - 03:14 pm: |
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Someone probably converted it(boat) to 12 volt years ago and often the starter is not changed as they will work fine on 12. |
jphoenix
New member
Username: jphoenix
Post Number: 2
Registered: 02-2007
| | Posted on Sunday, February 18, 2007 - 08:24 pm: |
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Well, I cleaned up the starter, lubed it and reinstalled - no help, time for a new one I suppose. Anybody know where I can find a starter for this M7? I suppose I will want a 12v, not sure why I would replace it with a 6v since it's getting 12 volts now.
Starter part number is 1113684 and the engine is serial number 32457.
Any leads appreciated.
Jim |
shawnstam
Member
Username: shawnstam
Post Number: 19
Registered: 10-2005
| | Posted on Sunday, December 02, 2007 - 11:45 pm: |
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Get one from a shop that rebuilds starters. Those engines were also used in welders and combines. that is where I got a replacement for mine now I just have it rebuilt when it goes bad. |
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