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Forum: Engines 10-17-2010, 02:51 PM
Replies: 9
Views: 3,861
Posted By ussoldier_1984
nope not a marine starter been working great all...

nope not a marine starter been working great all season and its not gonna blow the boat up, you have a better chance of blowing your boat up with all mercruiser parts and not turning on the blower...
Forum: Engines 10-16-2010, 12:45 PM
Replies: 1
Views: 2,032
Posted By ussoldier_1984
How to tell if Ignition module or ignition sensor is bad

How do you tell If its the ignition module or the ignition sesnor? Having hesitating issues still and backfireing when accelerating loss of power. It seems as if the boat is going nuts on the...
Forum: Engines 10-14-2010, 11:26 PM
Replies: 13
Views: 3,541
Posted By ussoldier_1984
why would a one day old coil go bad though?

why would a one day old coil go bad though?
Forum: Engines 10-06-2010, 11:01 PM
Replies: 13
Views: 3,541
Posted By ussoldier_1984
flippin a somthing died in the ignition system...

flippin a somthing died in the ignition system agian boat will not run. I am not sure if its the coil or ignition sensor again. I did the test with the red white wire and i had 12 volts then with...
Forum: Engines 10-02-2010, 12:37 AM
Replies: 13
Views: 3,541
Posted By ussoldier_1984
still had an issue with poping back turns out...

still had an issue with poping back turns out that the alternator took out the ignition optic sensor in the distributer cap. not sure if that was the right name but replaced it now boat is running...
Forum: Engines 09-28-2010, 10:35 PM
Replies: 13
Views: 3,541
Posted By ussoldier_1984
ok with the alternator disconnected the engine...

ok with the alternator disconnected the engine runs great I was able to get it in time at 8 degrees before top dead center
Forum: Engines 09-28-2010, 09:57 PM
Replies: 13
Views: 3,541
Posted By ussoldier_1984
well irrigardless im gonna have to replace the...

well irrigardless im gonna have to replace the alternator its bad but beleive me I will be going over everything again if it acts up after I put the new alt in. as to the fuel system. its good its...
Forum: Engines 09-28-2010, 01:00 PM
Replies: 13
Views: 3,541
Posted By ussoldier_1984
thats what I was thinking. I dont know though. ...

thats what I was thinking. I dont know though. I am gonna try to find an alternator asap and let you know if it really does fix it. I couldnt afford the 200 dollars the dealer wants for a new...
Forum: Engines 09-28-2010, 12:32 AM
Replies: 13
Views: 3,541
Posted By ussoldier_1984
Ok got boat back from mercuiser mechanic they...

Ok got boat back from mercuiser mechanic they said the altinator was bad causing the motor to have really week spark?? what the heck? is that possible?
Forum: Engines 09-27-2010, 04:11 AM
Replies: 13
Views: 3,541
Posted By ussoldier_1984
starting from the begining

95 4.3 lx carbed 4 barrel ok I am gonna try to start from the begining all the events that led up to now. First I had an issue with what I thought was my coil my engine would die and stall and...
Forum: Engines 09-27-2010, 12:47 AM
Replies: 6
Views: 6,125
Posted By ussoldier_1984
i have heard that the higher the compression the...

i have heard that the higher the compression the hotter spark is needed if the engine will run at 25 deg before tdc (piston hasnt compressed the air fuel mixture completly) but wont run at 8 deg btdc...
Forum: Engines 09-26-2010, 11:50 PM
Replies: 6
Views: 6,125
Posted By ussoldier_1984
would a week coil make the motor not run at the...

would a week coil make the motor not run at the proper 8 deg? and allow it to run at 25 deg btdc?
Forum: Engines 09-26-2010, 11:12 PM
Replies: 6
Views: 6,125
Posted By ussoldier_1984
yep I did a full tune up dist cap rotor, wires,...

yep I did a full tune up dist cap rotor, wires, spark plugs, rebuilt carb, new fuel lines and filters. I have gone over it and over it many times to verify that the correct plug wire on the dist cap...
Forum: Engines 09-26-2010, 07:07 PM
Replies: 6
Views: 6,125
Posted By ussoldier_1984
how to check if my engine jumped the timing chain

95 4.3 mercruiser. I tried to time it to 8 deg before top dead center but It wouldn't start. It will start if its about 25 deg before top dead center. How can i check to see if the timing chain...
Forum: Engines 09-26-2010, 12:43 AM
Replies: 9
Views: 3,861
Posted By ussoldier_1984
Think i found out the answer to my question...

Think i found out the answer to my question myself. I read online that the thunderbolt IV ignition has a mbt (mean best timing circuit) and that purple wire i was asking what it was is called wire...
Forum: Engines 09-25-2010, 11:00 PM
Replies: 9
Views: 3,861
Posted By ussoldier_1984
ok update it turns out it was just a bad oil...

ok update it turns out it was just a bad oil pressure switch went bad. I jumped it and everything works great except my timing i turned the dist a little prior to see if bumping the timing would...
Forum: Engines 09-25-2010, 12:53 AM
Replies: 9
Views: 3,861
Posted By ussoldier_1984
well I think my coil bit the dust it seems I have...

well I think my coil bit the dust it seems I have a week red spark coming from the coil. Yes the alarm sounds when i turn the key on the ignition/electric fuel pump go through the starter but I...
Forum: Engines 09-24-2010, 07:27 PM
Replies: 9
Views: 3,861
Posted By ussoldier_1984
boat wont start

mercruiser 4.3 wont start its a 1995 model. got closer to the answer today.... I was told if I run a wire from the postive terminal of the battery to the coil see if it starts. it sure does but when...
Forum: Engines 09-23-2010, 11:36 PM
Replies: 4
Views: 4,575
Posted By ussoldier_1984
https://www.maxumownersclub.com/attachments/photobu...

https://www.maxumownersclub.com/attachments/photobucket/img_12078_0_58d45574c6cc3a8257c42366dfaa7958.jpg[/IMG]

what is the two black wires go to? they were disconnected since I have owned the...
Forum: Engines 09-22-2010, 09:10 PM
Replies: 4
Views: 4,575
Posted By ussoldier_1984
I think im still back at a spark issue...... I...

I think im still back at a spark issue...... I have a brand new dist cap and rotor new plugs new plug wires, put a new coil on it about 2 months ago. compression is at 150 at all cylinders +/- one...
Forum: Engines 09-22-2010, 07:01 PM
Replies: 4
Views: 4,575
Posted By ussoldier_1984
compression on a 1995 4.3lx vortec motor

what are acceptable compression numbers for my 1995 4.3 vortec 4 barrel carb motor?
Im getting 150 pounds accross the board +/_ a lb or two but for the most part they were no more then 2 lbs...
Forum: Engines 09-19-2010, 11:17 PM
Replies: 13
Views: 3,283
Posted By ussoldier_1984
I made sure number one was on compression when...

I made sure number one was on compression when the dist was on number one didnt have a compression tester but i used the old screwdriver in the spark plug hole to see when number one was tdc that the...
Forum: Engines 09-19-2010, 09:51 PM
Replies: 13
Views: 3,283
Posted By ussoldier_1984
here is pics of number one spark plug and number...

here is pics of number one spark plug and number 2 plug.... does it look like there is carbon tracing?
...
Forum: Engines 09-19-2010, 09:09 PM
Replies: 13
Views: 3,283
Posted By ussoldier_1984
Yes it was a sudden problem it happened about 2...

Yes it was a sudden problem it happened about 2 weeks ago it sounded like it ran out of fuel on the water then wouldnt start up it ran great up untill that point. I dont see how it could of come out...
Forum: Engines 09-19-2010, 05:33 PM
Replies: 13
Views: 3,283
Posted By ussoldier_1984
here is a short video of what my motor is doing...

here is a short video of what my motor is doing (dieseling backwards but not starting) timing is good. and checked ohms on spark plug wires is between 10 to 15 ohms is that ok?

...
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