SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: bubba15 on January 07, 2017, 11:00:32 PM
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Big block Chevy 454.The starter makes a grinding noise when starting. Used several shims to bring the starter down. Still grinds. Put new starter in, 11 tooth. Would I need to use a 9 tooth starter?Flywheel is 168 teeth. Need help ASAP. Bought the boat and never had a starter issue. Took it out to run her and she wouldn't run. Tried and tried but nothing. Checked carb And rebuilt the carb after seeing how gunked up it was. Once the carb was reinstalled this issue came about. No reason at all.
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Three things to check.
First off, shims are rarely, if ever "needed".
First things first. Battery voltage above 12.5 volts?
Second, slave solenoid used?
Third, knurled oem style bolts?
Fourth, ring gear in tip top shape?
Lastly, flex plate or flywheel?
GT
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And for the record, there is a Bendix with counts from 9 to about 30. So not real important so long as the diameter is correct for gear mesh.
GT
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Slave solenoid, yes
Knurled style bolts, yes
When you say ring gear, are you talking about the starter gear inside there?
And I can't really tell whether it's a flywheel or flex plate.
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New battery installed. Cranks over and engages the flywheel then disengages and grinds again. Old battery was one of our issues then. But now I'm thinking the flywheel might be too chewed up. Should I install a couple shims?
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mine was doing the exact same thing. i pulled it, checked the teeth on the fly wheel and they were fine. so i put it back in and it was still doing it. so i ordered a new one and put it on and it was perfect. guess the old one was just getting tired amd starting to go out. my guess would be the same for yours
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How many teeth on your new starter?
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How many teeth on your new starter?
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The tooth count is completely irrelevant.
Check the battery voltage while cranking, also, do you have a picture of your slave solenoid wiring?
Also, are the bolts straight and in good condition?
Do you have new ones?
And are you running a starter bracket on the brush end?
Cables good?
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I think your slave solenoid is wired incorrectly and you have low voltage at the "S" terminal.
To verify, use a jumper from the battery positive to the "S" terminal on the starter mounted solenoid. If that cracks normal, the problem is purely electrical.
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Might be the wrong starter. We pulled the spark plugs out and turned it over. Starter sounded fine under minimal load. When plugs were re-installed, issue came back again. Carb was removed to begin with so we didn't admit fuel to it. What kind of starter is anyone else running on a 454??
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Might be the wrong starter. We pulled the spark plugs out and turned it over. Starter sounded fine under minimal load. When plugs were re-installed, issue came back again. Carb was removed to begin with so we didn't admit fuel to it. What kind of starter is anyone else running on a 454??
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Wrong starter?
Highly doubt that.
Do you know how the slave is wired?
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I've heard the auto parts store starters might not be for this type of application. The starter is wired exactly as it came. One wire in (positive) to slave solenoid, one wire out (to starter), and one wire to ground...?? That sound right?
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I've heard the auto parts store starters might not be for this type of application. The starter is wired exactly as it came. One wire in (positive) to slave solenoid, one wire out (to starter), and one wire to ground...?? That sound right?
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Not really, but I could just be thick. Lol
There should be four wires on the slave solenoid.
There should be three wires on the starter mounted solenoid.
The heavy cable from the positive battery post should go directly to the large lug on the starter mounted solenoid. Also on that same terminal a smaller wire to one of the two large lugs on the slave.
The other large lug on the slave goes to the "S" terminal on the starter mounted solenoid.
The "I" terminal on the starter mounted solenoid needs to go to the ignition coil "+" terminal.
The slave solenoid "S" terminal goes to the ignition switch "S" terminal.
Depending on which slave solenoid you have, the other small terminal goes to ground "G" or nothing (because it will have an "I").....
The "S" terminal is what pulls the Bendix into the ring gear. If this voltage is to low because of parasitic voltage drop, it won't pull the Bendix in hard enough doing exactly what you describe.
Just a hunch.
GT
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Everything was re-wired the way it came off the old one before this problem came up. The battery was replaced earlier so we know that it's got the voltage going to it. We tested the starter with it off the engine and the bendix gear worked as it should. Should the small wire on the slave solenoid be moved to the other small terminal on there maybe?
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Everything was re-wired the way it came off the old one before this problem came up. The battery was replaced earlier so we know that it's got the voltage going to it. We tested the starter with it off the engine and the bendix gear worked as it should. Should the small wire on the slave solenoid be moved to the other small terminal on there maybe?
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What is the designator lb the terminal? Do you have a picture?
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Here's how it's wired up now
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Here's how it's wired up now
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Have a picture of the other solenoid?
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That's it.
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That's it.
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Nope.
There should be another solenoid or relay to be called a true "slave solenoid" set up, that's just the starter mounted solenoid.
You should install a second solenoid to side step any further issues down the road. You may (or may not) be able to fix the issue temporarily with a new ignition switch, but would love to see what it does by jumping the starter terminal at the starter first.
JMHO
GT
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Need something like this here. .
GT