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Old 11-12-2018, 12:30 AM   #1
Lt. JG
 
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Default 2000 2800 SCR 4.3L not turning CLANK noise

So here is my story. When bought the boat the starboard engine 4.3 L carbureted had milky oil, problem was a faulty head gasket.

I did not want to take any chances and I replaced
1)riser
2} manifolds,
3)elbows,
4)new starter
4) spark plugs
5) head gasket and new head
6) clean twice the carburetor and install new kit on it “TWICE”
7) water/gas separator
8)Fuel Filter
9) Flappers and one of the freeze Plug

You can tell I had to work a lot on the engine to be able to go out 3 times ☹. Then Hurricane Florence came to NC and I had to move my boat to inland . After I got the boat on the trailer I flushed the engine with fresh water before starting the ride back to Home . Florence came and it took me around 2 week to drain the engines (remove the blue drain plugs), Well I said, it was just fresh water in the engines

Finally, I had to put the drain plugs back on so I can winterize the engines .. put the water hose to get the engine on right temperature before the antifreeze , earmuff and CLANCK CLANCK CLANK .. Engine was not turning .. ? What is going on the engine start like brand new one after I installed the new heavy duty starter… what happened ? Actually , I was able to see the starter trying to move. but No WAY JOSE .. too tight . I had to turn the engine manually with a breaker bar and the engine move but it was very hard to move .. I said .. I must have water in a piston or I have a stuck valve .. anyway I was able to turn the engine and as soon as the engine got loose. it started normally and I was able to winterize it.

This time I did not drain the engine with the antifreeze to simulate the same scenario I had when I moved the boat to inland before Florence. I wanted to check if one of my seal on the riser was leaking. Well, After 1 ˝ week I removed every single spark plug and there was not antifreeze on any of the 6 pistons .. Oil is a clear as it can be .. Like I said I just went out 3 times. No water on the oil either. I know it is good news that there was not antifreeze on the piston, but now I have not idea what could it make the engine get stuck? Any hints?


Thank up in advance ...

Jose
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Old 11-12-2018, 01:59 AM   #2
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My quest is the new starter.
i see that happens before.
What was wrong with the old starter?
If you steal have it. Install the old one back and see if that fix the problem.
The new come with any shims? Or the old have any shims when you remove it?
When you remove the new check see if the shaft is not bend.
Good luck.
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Old 11-12-2018, 02:28 AM   #3
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With the spark plugs out do you still get the clunk when trying to turn the engine over? Did you check to verify the starter did not come loose? When you installed the new starter did you check to ensure the bolts were the correct length? Sometimes the unthreaded portion sticks out beyond the ear on the starter preventing the starter from being pulled up tight to the engine.
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Old 11-12-2018, 07:05 PM   #4
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Quote:
Originally Posted by Gugi47 View Post
My quest is the new starter.
i see that happens before.
What was wrong with the old starter?
If you steal have it. Install the old one back and see if that fix the problem.
The new come with any shims? Or the old have any shims when you remove it?
When you remove the new check see if the shaft is not bend.
Good luck.
The old starter finally died, so I bought the High Performance GM Gear Reduction Marine Starter Arco-30470. I did not want to deal with the starter on the starboard side of the 2800 SCR EVER again .. it is really difficult to work with due to no room between holding tank and engine. ( I am big guy too ) . No shims from the old starter and not shims needed for the new one. It was a perfect fit.


Quote:
With the spark plugs out do you still get the clunk when trying to turn the engine over? Did you check to verify the starter did not come loose? When you installed the new starter did you check to ensure the bolts were the correct length? Sometimes the unthreaded portion sticks out beyond the ear on the starter preventing the starter from being pulled up tight to the engine..
I know what are you talking about the bolts because I was looking for a new set of bolts that match exactly the original.. I did not want to deal later with a broken bolt on the block .. so I make sure that they matched the lenght BUT the unthreaded part of the bold hehehe.. I learned that they were not exact match on the hard way I still remember that hot evening in the bilge :-).



With the spark plugs out do you still get the clunk when trying to turn the engine over ???


I was able to crank the engine and got it running without problem with the sparkplugs, no clunk noise ..just normal .. like nothing happened.


I am leaning on the MAYBE the starter got loose .. but I was able to turn on the engine 4 or 5 times more and there was not clunking noise .. just like nothing happened. But its not going to hurt to check on those bolts again.

Thank you guys on the feedback . The part that I still do not get it Why the engine got really difficult to turn manually at one point and then got loose. That was when I though that I got water on one of the piston.. but well I did not find any..


Thank You

Jose
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Old 11-12-2018, 08:20 PM   #5
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If the problem is confusing, it's probably electrical.
Test your battery voltage at rest.
Test your battery voltage with the starter engaged. If voltage is 10 or higher, then battery itself is not the cause.
Next, test your starter motor voltage when cranking over the engine. Is it the same reading as the battery during cranking?
If your battery is reading 10 or higher during start, and the voltage is getting to the starter, then the starter itself is suspect.
You also had the engine apart, so do you feel certain you replaced the push rods properly?
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Old 11-13-2018, 01:31 AM   #6
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When the engine was hard to turn with the breaker bar were all the spark plugs removed? She was either hydolocked or some internal reciprocating component was binding, spun bearing or jammed starter.
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Old 11-13-2018, 09:56 PM   #7
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I know that there were two that were dropped into the bilge by mistake and they maybe not be replaced them on the right location .. Cannot tell to tell you the true.

Battery are new and the Charger were plugged while starting the engine ( I have the 120 V) connected to the boat.
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Old 11-13-2018, 10:04 PM   #8
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Quote:
Originally Posted by mmwjr View Post
When the engine was hard to turn with the breaker bar were all the spark plugs removed? She was either hydolocked or some internal reciprocating component was binding, spun bearing or jammed starter.
The plugs were not removed while turning the engine with the breaker bar.. the engine was cranked when it past the hard part of the turning.. I though the same thing .. the engine was hydro-lock, but I could not find any antifreeze when I left the engine with it for a week to recreate the failure . No antifreeze on any piston.

Only difference that I could tell is that I trailered the boat from the Coast to Raleigh with "fresh water" in the engine and when I tried to recreate the second time with the antifreeze the boat did not move at all .

I was thinking to crank the engine over the winter , but then I have to re winterize it again.. and its going to get cold to be handling water hehehe ..

I will check the bolts this Friday on the Starter... but I would expect to hear the clunk noise every time I start the engine (3 or 4 ) before the winterize process.. and there was not clunk ..

oh well .. another mystery on the boat...
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Old 11-14-2018, 12:09 AM   #9
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Quote:
Originally Posted by marcucho View Post
I know that there were two that were dropped into the bilge by mistake and they maybe not be replaced them on the right location .. Cannot tell to tell you the true.

Battery are new and the Charger were plugged while starting the engine ( I have the 120 V) connected to the boat.
You can damage the battery charger doing this as it is not designed to supply starting current.
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Old 11-14-2018, 12:15 AM   #10
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You can turn the engine manually over the winter if you want or even with the stater for a few seconds. The latter will damage the impeller. Not sure what you are trying to prove doing this. BTY if antifreeze is blown out there no need to rewinterize as air doesn’t freeze.

Kind of lost as to the current status,

Turns over manually, yes/no?
Turns over with starter, yes/no?
Clunks, yes/no?
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