Slow cranking engine that doesn't like to fire |
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sandusky
Member Joined: 19 Sep. 2010 Location: S.E. Iowa Status: Offline Points: 1768 |
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Posted: 08 Apr. 2014 at 6:49pm |
For the last couple years I've been fighting a slow cranking engine.this came after a complete rebuild of engine,new Battery(two),new distributor,I have also rechecked my grounds and am running heavy cables all from Walcks,as I went through the process of reassembly ,I sent my Geny. and Starter in to Walcks to have them rebuilt.It was brought to my attention that my timing might be off one tooth,does that mean the gears in the front of the engine or the distributor?Im wondering if my Starter(6volt) has been the problem so it's off to be checked. I've been wanting to keep "Little Red" as stock(except for brake conversion)possible,but I'm considering the jump to 12 volts. Please someone Stop me!Im afraid this could lead me using a leaf blower instead of a rake an be like all the other old guys in the neighborhood Same War,Different Battle.Sandusky |
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russnj
Admin Webmaster Joined: 20 July 2005 Location: W. Windsor, NJ Status: Offline Points: 3943 |
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Don't do it 6 volts will work!
Have you replaced the starter bushing that is in the bell housing? Also have you checked your starter/floor switch? A quick test is to crank it with the ignition off a few times and see if anything heats up, that will help tell you what is faulty. |
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43 MB, 48 CJ2A, 50 CJ3A, 55 M38A1, 56 CJ5, 79 M151A2, M100 ,65 M416 |
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Joe J
Member Joined: 08 Dec. 2013 Location: Missouri Status: Offline Points: 82 |
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I would not convert it over to 12 volts. My 46 CJ2A is still 6 volts and it works fine.
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sandusky
Member Joined: 19 Sep. 2010 Location: S.E. Iowa Status: Offline Points: 1768 |
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I installed a new bushing in the bell housing when we installed the starter. I've also put 2 new foot switches in.
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sandusky
Member Joined: 19 Sep. 2010 Location: S.E. Iowa Status: Offline Points: 1768 |
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Ive also heard that an engine that is way out of time will crank very slowly.But as far as what we see it's all good.
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TERRY
Member Sponsor Member Joined: 22 May 2007 Location: BOULDER COLORADO Status: Online Points: 3396 |
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Timing won't change cranking speed. If the engine was tight I would expect overheating issues. You have looked at the grounds, but how about checking for voltage drop across the circuit?
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BOULDER 48 2A
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scoutpilot
Member Joined: 30 Dec. 2008 Location: Asheboro, NC Status: Offline Points: 4373 |
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Is, or will be, all of your starting related wiring new? If not, look over your old wiring and search for blisters in the vinyl. Under those blisters, if you find any, will be corroded wiring. Other than that, I can only think that one section or circuit is using under gauge wire.
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sandusky
Member Joined: 19 Sep. 2010 Location: S.E. Iowa Status: Offline Points: 1768 |
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We installed a new wiring harness so all is new and correct gauge for 6 volt system. I'm sure this will get figured out,but the weather has started to at least turn more Spring like., and Hudson is only weeks away. Keep pitching I'll keep swinging. Thanks
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scoutpilot
Member Joined: 30 Dec. 2008 Location: Asheboro, NC Status: Offline Points: 4373 |
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Ground straps, enough, right locations, shiny clean connections?
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Schimms15
Member Joined: 17 Jan. 2011 Location: milwaukee, Wisc Status: Offline Points: 2953 |
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have them do a start load test. get the compression on your engine, check the valves to make sure they are set properly. make sure the battery puts out enough cold cranking amps.
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46 2a
51 truck project named Karen |
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sandusky
Member Joined: 19 Sep. 2010 Location: S.E. Iowa Status: Offline Points: 1768 |
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Ok, took my starter to a buddy of mine he's going to run it through the wringer. I've been pulling cables off and cleaning all contact surfaces.before pulling the starter I jumped from the battery to the starter,going around my foot switch.Besides a few sparks,she still didn't crank any faster.Sooooo.Im thinking its the starter. At least I'm hoping .
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johnnybravo
Member Joined: 14 Feb. 2008 Location: Glen Lyn, VA Status: Offline Points: 2075 |
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I guess it cranks slow but it does start?
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Ret. USAR-Vet, 6-GPW's,, 1-M38 w/M-100, 1-47 WO "Jeep" 4X2 Wagon, several ruff CJ2&3A's, 1-CJ3B,
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sandusky
Member Joined: 19 Sep. 2010 Location: S.E. Iowa Status: Offline Points: 1768 |
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Not very well! I carry a couple of extra sets of points and condensers. Ether,Spark plugs,Jim Beam.
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johnnybravo
Member Joined: 14 Feb. 2008 Location: Glen Lyn, VA Status: Offline Points: 2075 |
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Maybe with this additional info these guys can reconsider. Sounds like something other than starter, since you had it rebuilt. Most of those guys bench test rebuild but it could have a malfunction. You are getting it double checked so you will know about it soon. When running does it run strong and smooth?
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Ret. USAR-Vet, 6-GPW's,, 1-M38 w/M-100, 1-47 WO "Jeep" 4X2 Wagon, several ruff CJ2&3A's, 1-CJ3B,
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sandusky
Member Joined: 19 Sep. 2010 Location: S.E. Iowa Status: Offline Points: 1768 |
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When we get it started it runs smooth and idles down very nice,although it lacks power going uphill.I have noticed some power is restored after replacing the condensor. I'm still questioning the timing ,any chance it could have been assembled incorrectly when they reassembled the Engine?
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Oilleaker1
Member Joined: 06 Sep. 2011 Location: Black Hills, SD Status: Online Points: 4406 |
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The one tooth question is the oil pump/distributor meshing. You pull the oil pump down and it twists. Rotate it one more tooth either advance or retard and re install. This gives you room to rotate the distributor in the right range or orientation up top so you can adjust the timing without running out of travel. As to slow cranking, I'd do as you have and get the starter R&R'd. They will indeed fight the starter if too far advanced while cranking. A slight adjustment at the distributor makes a huge difference. Weak advance springs in the distributor can also screw with you. It can run fine at idle and start, but go too far advance at running speed and heat up the engine. I've had no problem with 6 volts and I think 12 volts is too hard on your 6 volt starter. Especially the bendix being slammed into the flywheel. You'll get it with some tinkering. John
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Green Disease, Jeeps, Old Iron!
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sandusky
Member Joined: 19 Sep. 2010 Location: S.E. Iowa Status: Offline Points: 1768 |
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Thanks
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plowpusher
Member Joined: 20 Oct. 2008 Location: lino lakes mn Status: Offline Points: 581 |
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Pull the coil wire if it cranks faster it's an ignition problem if it still cranks slow it's not.
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when i grow up i wanna be a kid
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