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Forum: Engine / Drive Train 10-10-2018, 01:43 PM
Replies: 4
Views: 117
Posted By Cumminscj
That sounds right as long as the timing is steady...

That sounds right as long as the timing is steady when you go to set it. It generally does not run well and you need to raise the rpms to 1,000
Forum: Engine / Drive Train 10-10-2018, 12:46 PM
Replies: 4
Views: 117
Posted By Cumminscj
You don't say how you turned off the mefi...

You don't say how you turned off the mefi control, but in order to time it you put it into diagnostic mode, raise the rpms to 1,000 and set it to 10 degrees. If the timing is jumping around you...
Forum: Engine / Drive Train 10-01-2018, 09:35 AM
Replies: 13
Views: 311
Posted By Cumminscj
OK, You have a bad connection somewhere. There...

OK, You have a bad connection somewhere. There is no self resetting thermal. You need to just start taking connections apart and cleaning them. IF someone has put temporary terminal ends on it at...
Forum: Engine / Drive Train 09-27-2018, 04:00 PM
Replies: 13
Views: 311
Posted By Cumminscj
Do the gauges instantly come back or is there a...

Do the gauges instantly come back or is there a delay? If there is a delay I usually find there is a dirty connection somewhere. The connection may even be tight. You just have to start chasing...
Forum: Engine / Drive Train 09-22-2018, 04:30 PM
Replies: 29
Views: 590
Posted By Cumminscj
Glad you got it sorted and enjoy the rest of your...

Glad you got it sorted and enjoy the rest of your season!

And yes I would just put a sensor in the hole.
Forum: Engine / Drive Train 09-21-2018, 10:04 AM
Replies: 42
Views: 1,491
Posted By Cumminscj
Out of curiosity for future testing purposes. If...

Out of curiosity for future testing purposes. If the manufacturer says 10V is within spec and the op is measuring that key on engine off, then when he is cranking he is likely getting around 8v. ...
Forum: Engine / Drive Train 09-21-2018, 09:52 AM
Replies: 8
Views: 473
Posted By Cumminscj
If it runs when you pump the throttle then you...

If it runs when you pump the throttle then you likely have something blocking some jets in the carb. The carb is getting fuel and that is how the accelerator pump has fuel to add, but it sounds like...
Forum: Engine / Drive Train 09-19-2018, 08:57 PM
Replies: 29
Views: 590
Posted By Cumminscj
It's 180 off. As the intake valve starts to open...

It's 180 off. As the intake valve starts to open the Piston is going down and sucking in fuel/air mixture. The valve closes and the Piston comes up to the top of the stroke while compressing the...
Forum: Engine / Drive Train 09-17-2018, 02:58 PM
Replies: 29
Views: 590
Posted By Cumminscj
If you have checked your reference voltages,...

If you have checked your reference voltages, signal outputs, and grounds and everything is good but you still are no start then you need to go back to the basics and tell us what you have done to...
Forum: Engine / Drive Train 09-13-2018, 08:47 PM
Replies: 27
Views: 10,222
Posted By Cumminscj
Take the whole aluminum bracket and I'm assembly...

Take the whole aluminum bracket and I'm assembly out. Will be much easier to work on that way. I think it took me 10 minutes or so and most of that was labeling plug wires.
Forum: Engine / Drive Train 09-11-2018, 08:59 AM
Replies: 29
Views: 590
Posted By Cumminscj
If you see the injectors spraying fuel during...

If you see the injectors spraying fuel during cranking and you have spark then you have the timing 180 off. Pull it while at TDC and rotate the rotor 180 degrees.

It is unlikely it could be or...
Forum: Engine / Drive Train 09-06-2018, 09:48 AM
Replies: 13
Views: 365
Posted By Cumminscj
That is the proper test procedure. If I remember...

That is the proper test procedure. If I remember correctly when you get up around 8-10degrees of slop the chain can jump. Use the marks on the crankshaft to measure properly.
Forum: Engine / Drive Train 09-04-2018, 05:03 PM
Replies: 8
Views: 255
Posted By Cumminscj
I thought correct pressure on the MCX was 4bar? ...

I thought correct pressure on the MCX was 4bar? The LTR I know ran 3 bar but I am pretty sure this should be 4 bar. Anyone care to verify?
Forum: Engine / Drive Train 09-04-2018, 04:59 PM
Replies: 13
Views: 365
Posted By Cumminscj
Is there any chance the chain jumped? how many...

Is there any chance the chain jumped? how many degrees of rotation are you getting before the cam moves?
Forum: Engine / Drive Train 08-31-2018, 11:18 AM
Replies: 16
Views: 470
Posted By Cumminscj
I don't know the resistance, but key on engine...

I don't know the resistance, but key on engine off you should have 12.5v on the input and. 10.5 output. Running should be 14.5 and 12.5 respectively.
Forum: Engine / Drive Train 08-30-2018, 05:14 PM
Replies: 16
Views: 470
Posted By Cumminscj
Check the voltage to the distributor and coil...

Check the voltage to the distributor and coil when this is happening. Wires heat up, resistance goes up, voltage goes down and bad things happen. I had a boat that would do this but not quite as...
Forum: Engine / Drive Train 08-29-2018, 09:50 AM
Replies: 24
Views: 910
Posted By Cumminscj
Did you every get all 8 plugs pulled to see if it...

Did you every get all 8 plugs pulled to see if it would turn over freely?
Forum: Engine / Drive Train 08-27-2018, 09:13 AM
Replies: 24
Views: 910
Posted By Cumminscj
That explains the 4.3L we chased, and then...

That explains the 4.3L we chased, and then happened again a couple years after the new motor. Guy finally just sold the boat.

The other boat was a 91 Prostar 190 with a Ford in it.

I don't...
Forum: Engine / Drive Train 08-24-2018, 03:25 PM
Replies: 24
Views: 910
Posted By Cumminscj
Maybe a better statement would be that it's not...

Maybe a better statement would be that it's not uncommon? I've seen it across multiple platforms and manufacturers. Now the guys I run with we mostly have older boats but 2 out of the 10 have had...
Forum: Engine / Drive Train 08-24-2018, 12:45 PM
Replies: 24
Views: 910
Posted By Cumminscj
Typically the riser gasket fails, manifold...

Typically the riser gasket fails, manifold cracks, or the exhaust flapper is missing or bad and allows water in.
Forum: Engine / Drive Train 08-24-2018, 11:25 AM
Replies: 24
Views: 910
Posted By Cumminscj
All electrical is working fine. Would generally...

All electrical is working fine. Would generally indicate that the electrical is fine and you have hydrolocked the motor. Get the plugs out and turn it over to see if you have water in the...
Forum: Engine / Drive Train 08-23-2018, 05:28 PM
Replies: 3
Views: 262
Posted By Cumminscj
Put the fitting in you read about and get the...

Put the fitting in you read about and get the system pressure. If you think the regulator is choking it out the simple test is to squeeze the return(rubber) line with a set of pliers and see if the...
Forum: Engine / Drive Train 08-20-2018, 10:39 PM
Replies: 50
Views: 1,933
Posted By Cumminscj
I would pull the starter off. Had a friend that...

I would pull the starter off. Had a friend that made this same mistake 3 times. Once so bad ot burned the fiberglass mufflers and had to replace them. Motor was fine every time. Never even used...
Forum: Engine / Drive Train 08-17-2018, 09:55 AM
Replies: 2
Views: 143
Posted By Cumminscj
Probably, but pull the backseat out and put your...

Probably, but pull the backseat out and put your hand on the tank and the fuel pump module. If its making noise I would go ahead and replace it or at least the pump.
Forum: Engine / Drive Train 08-15-2018, 09:53 PM
Replies: 5
Views: 274
Posted By Cumminscj
Ignition switch or the ballast bypass. I would...

Ignition switch or the ballast bypass. I would start with the switch.
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