Battery ground strap location on M/C 5.0 0m012817

[rick3452]

Hey guys, having some issue while starting boat only on the "first start" of the day. It just started happening recently and Iv'e tried to track it down. So when I start the engine I get an annoying noise ( not a clunk) but it does start (always) If you shut it right off and restart it make no noise, just starts as normal and even if it sits for couple hours it will restart with no noise.
It seems to be an electrical issue as this morning I pulled all the plugs to see if during the night I was getting water intrusion through my exhaust elbow's. No water signs at all. Now after I "first" start it ( by the way I've always started it it using the switch to both batteries) and I restart a few times using both batteries (no noise) its only when I switch to Batt 1 or Batt 2 then I get the noise...... switch back to both and starts no noise... Ive cleaned the terminals, no wing nuts etc, cleaned the ground post near the batteries and that seemed to help for a bit. Now I'm wondering where the ground is on the engine itself.. I also checked the nut on the starter, nice and tight...batteries fully charged. by the way I've had the boat four years and use it every day. 1550 hrs.
Each Battery reads 12.79 with voltmeter (eng off) while running 14+
Any thoughts
Thanks Rick

 

[sub2010ss]

Problem sounds similar to what I was dealing with not to long ago. Although my start sounded as if I had weak batteries. I thought I had all my terminals clean until I pulled them off again and used 40 grit sand paper. My ground terminals are located on the port side near the batteries on the back of the block on a stud. I'd try a voltage drop test and see if you can narrow it down to a single component.

 

[achris]

Describe the noise, or better, video it and post it on youtube and link it here.

 

[rick3452]

Describe the noise, or better, video it and post it on youtube and link it here.

Hi Chris tried that and then starter now "gone" Now when I turn key just high pitched spin no engaging almost sounds like teeth are gone.

Question now is.... I have limited tight access to the starter, How many bolts hold it on???

 

[rick3452]

http://youtu.be/EJ53CuXj8S4

Hope link works!

 

[rick3452]

Another update got into eng compartment grabbed hold of the starter. It was floping in the wind. The bolt close to me had sheared off and was in the bilge. I tightened the other bolt and set it back in place and tried to start different noise now. I dont think there are any teeth on the starter.

 

[achris]

By the look of that first attempt in the video you may have hydro-locked the engine. Pull the plugs and check for water.

 

[Bondo]

Another update got into eng compartment grabbed hold of the starter. It was floping in the wind. The bolt close to me had sheared off and was in the bilge. I tightened the other bolt and set it back in place and tried to start different noise now. I dont think there are any teeth on the starter.

Ayuh,.... A Chevy starter will not work with only one bolt in it,.....

Ya need to pull the starter, 'n get the broken bolt outa the block,....

Hopefully it's only the starter teeth torn up, 'n not the ring gear teeth,...

A New starter, 'n New starter bolts might save it,......... or not,....

 

[rick3452]

Thanks, could you please provide me the correct number for OEM Mercruiser complete starter assembly 0m012817

 

[achris]

Thanks, could you please provide me the correct number for OEM Mercruiser complete starter assembly 0M012817

50-807904A1

 

[rick3452]

50-807904A1

Thanks! And yes I did pull the plugs the previous day to check for hydrolock , not a trace..

 

[achris]

Thanks! And yes I did pull the plugs the previous day to check for hydrolock , not a trace..

Something stopped that starter motor. Bolts rarely break by themselves.

 

[Fun Times]

50-807904A1

Which has superseded to 50-863007A 1.

50-863007A1

STARTER MOTOR ASSEMBLY

This is the new style permanent magnet starter. If replacing an older starter you will also need 2 new bolts, part number 8053432

http://www.mercruiserparts.com/Show...680.png&inbr=2697&bnbr=40&bdesc=Starter+Motor

50-863007A1	STARTER ASSY	807904A1	$224.91	$202.77	$0.00	$0.00	8.76 Lbs

Part Number Description Superceded
From List
Price Online
Price Core
Chg Cont
Chg Ship
Weight
Each Order
Quan

 

[achris]

Thanks FT. I didn't look at the supercession history, just the number that came up in my EPC...

 

[rick3452]

Thanks again guys..... I puled out the starter today and bloodied and bruised to prove it. But no luck, I bought right angle drill adapter, left hand bits, extractor and I worked on it for 1+ hrs, not even a dent! Of course I'm working on my back upside down.. Next week motor to be pulled.
And yes I will only allow OEM
Thanks!
Rick

 

[rick3452]

UPDATE Yesterday I was determined to get that bolt out! I still tried a few left hand bits and put as much pressure as I could being upside down in the shape of a pretzel and had no luck. So I decided to just drill out the bolt starting with several 1/4 inch bits, then 3/8 Then I finally reamed It out as far as I could with the correct bit to tap a 7/16th thread for the new size bolt. Put the new O.E.M starter on, bolted it up started it several times and all is good!
It now starts so quiet, I guess its been going for a while. Thanks for all your suggestions..... Rick