M-25 Universal Diesal Starting Problem

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Crawford

About a week ago I posted a help message for my c-30.I received some advice but nothing worked. Help again. I replaced all four batteries and had the starter removed and tested. My boat still will not start using all 4 batteries but will when I connect a charger to it. The M-25 is a three cylindar diesal. I purchased it 3 months ago and have not been able to start it without the charger. It is an '83 model. I suspect it has a history of this problem. The previous owner said it was the brushes but as I had mentioned the starter checks out in excellent condition... Any ideas. Am thanking you in advance....
 
Dec 2, 1999
15,184
Hunter Vision-36 Rio Vista, CA.
If you have tried everything......

Crawford: If you have tried everything (glow plugs included), it sounds like you have some type of voltage problem. I would think if your problem was a ground, it would not crank over no matter how much battery power you gave it. By increasing the voltage with the charger, you may be getting around a problem with a loose connection, corrosion etc. I would disconnect the wires at the ignition and clean them with some liquid electronics cleaner and/or a wire bruch and some sand paper. Be sure to do the same on the starter end. You may also want to check the wiring harness for resistance (this was also mentioned). If/when all of this fails and you are at your ropes end you will probably need to contact a mechanic. How are your batteries testing for voltage. Just because they are new does NOT mean that they are good. Please keep us posted on your progress (or lack there of).
 
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Cecil

Voltage at Starter ??/M-25 Diesel

Several thoughts come to mind, concerning your starting problem, this is what I would check. (1)Batt voltage@batt`s (2)Batt voltage at starter lug/soleniod- both should be 12v (3) All connections, sounds like voltage not there until you use the charger to supply the needed voltage to start-I`m guessing bad connection/open circuit somewhere in the batt pos to the starter or solenoid, since I assume once you have the needed voltage you can start it with the key/start button? hope this helps, let us know ,Later Cecil
 
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Vic

Lets try again

1. does the selenoid kick in when you turn the key on without the charger ... and if so does the engine turn over but not start? That's one problem 2. does the engine not turn over? ... that's another problem 3. do you have to advance the trottle pretty far to get it to start or is just a little diesel ok? when it does start can you get full revs out of it? that's another problem. Lots of different things enter into it ... from fuel stavation to bad selenoid to bad wiring ... but there is no question that that engine should start with a decent sized 12 volt battery.
 
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Chuck Britton

Starting an engine

Let me first qualify my suggestions,I am an ASE Certified Master Automobile technician, with 20 years experience. I am unfamiliar with the engine/battery arangment of the Cat 30, but here is something to try. If you can take a pair of GOOD quality jumper cables and attach them from one of the batteries to the engine. The hot lead directly to the starter post and the negative lead to the engine block. What this will do is tell you if the cables from the batteries to the engine are corroded inside and causing too much resistance to allow enough amperage to get to the starter. I would suspect that when you hook up the jumper cables the engine will start. Although voltage is important in this case the amperage is more important. You could have full battery voltage at the engine with bad power leads and not have enough amperage to sufficiently turn the stater over. This ofcourse is a diagnostic tool. If the engine does start with that jumper cables hooked up then replace the main power leads frome the batteries to the engine. Hope this helps.
 
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Mike I

Starting upgrade.

First off, I would suggest you join the C-30 email list on Sailnet. You will get a lot of good info there. I would assume you are using the correct starting proceedure; Seacock open, battery switch to "1" or "both", glow plugs on for about 45 seconds, and crank. I upgraded the starting system on my C-30 and it can be seen at the link below. With a cold engine I use the glow plugs 15 to 20 seconds and she fires up, first try, every time, even if she hadn't been run for two weeks. Faith has a group 24 starting battery.
 
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Mike I

Link

I guess I know more about engines than I know about computers. If you tried the link in my previous post and it didn't work (like I did!), try ftp://ftp.sailnet.com/c30/Faith.
 
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cole

Current Problem???

Now that you have time to disassemble every connection on the battery switch and the soleniod and the starter clean them with a wire brush and reassemble them with grease. If you are getting voltage to the starter and nothing happens then the charger is over comming a bad connection somewhere. You can also look for heat using an infrared detector to check for hot spots cole Bobs Degree c30
 
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Crawford

Crawford With the Starting Problem

Hey guys. Thanks for the great advice. I will not be able to try some of your sugestions until the week of Feb. 18. I failed to tell you that the engine turns over just fine with the help of the 4 batteries but will not start until the charger is added to it. Tx. Again, Crawford. Will let you all know!
 
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Crawford

Universal M-25 Owner-Crawford

Thanks to all of you who sent advice for starting my diesal. I failed to mention that the engine turns over with the four new batteries but will not start until the charger is hooked up to it. That is a lot of voltage to start it. I will try the various things you helpful people sent and put them in practice the week of Feb. 18. Any other ideas will be very much appreciated. Crawford
 
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Vic

easy way to check glow plugs ...

is just to look at the amp meter when you push the glowplug button ... it really kicks the ampmeter down when they are working.
 
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