mercruiser 4.3 liter 262 cant dial in timing and carb seems to flood

[Bt Doctur]

you don't know where its pointing untill you remove the cap, get #1 on compression TDC and see where its pointing. The actual spot for #1 can be anywhere on the cap.You might be off a tooth or 10 teeth.
If there is a point designated #1 ,then that's where the rotor should point to.

 

[merls bait shop]

hello, thank you for all helping me out, i will try to re set distributor today , as its been quite stormy here the last few days....... will keep everyone posted. p.s. i thought i had it pretty close to to number one cylinder at tdc but i guess not.....

 

[Eric 3.7LX Alpha 1]

Get the engine at #1 TDC on the compression stroke by rotating the engine by hand with the spark plug out and your finger over the hole. When you start to feel air push your finger off look at the timing mark at the balancer and continue to turn the engine until the timing mark is at zero. That will be #1 at TDC on compression stroke.


Put a piece of tape on the body of the distributor under the cap, under the post on the cap you want to make #1.... and mark it with a pencil or pen center of the post. So that when you remove the cap you have the tape and mark to tell you when the post is on the cap.


Now you drop the distributor in and get the rotor pointing at that mark on the tape which will the #1 cylinder. You may have to turn the oil pump drive shaft under the distributor with a scewdriver to get in the right spot.

You can actually stop turning the engine at your correct timing instead of Zero... stop it at 8? BTDC, and drop the distributor in so the rotor is pointing right at the mark on the tape and tighten it down. You should be right there.

 

[merls bait shop]

hello, ok so i tried to set the timin yesterday, had #1 cylinder at tdc bumped the dist,back a couple teethe seems to run better but the mark on the still wont line up with the mark on the timing chain cover......stil at about 14 degrees before tdc ( just before gauge starts ) on cover......i did notice a little play in the dist shaft maybe i should buy a new dist ?? thank you .

 

[Grub54891]

It's possible the vibration damper slips,Mark it with a line,run it again,and see if the line moved. How does the rubber look on it?

 

[merls bait shop]

hello, so the plot thickens.......i also noticed there is "play " in the rotor on the shaft, maybe this could cause the timing problem ?

 

[Bondo]

hello, so the plot thickens.......i also noticed there is "play " in the rotor on the shaft, maybe this could cause the timing problem ?

Ayuh,... The rotor should fit Snuggly on the shaft,....

Mercruiser actually glues the rotor to the shaft,.....

 

[achris]

I know I'm late to the party, but here are some observations.

hello all, thank you for the help. so does anyone think the distrbutor is off a tooth ??

Would not matter if it was. Timing is done electronically. All the sensor in the distributor does is give a reference. The module (mounted to the side of the port exhaust manifold) adjusts the advance according to the engine speed it calculates from the pulse interval. The advance curve is programmed into the module circuitry.

Can you get the engine to continue to run if you adjust the engine idle speed as you retard the timing? What is the idle speed at 12 BTDC?

Chris.......

 

[achris]

firing order is 1,8,4,3,6,5,7,2 in a clockwise manner.

Errrr, no, it's not. Firing order is 1,6,5,4,3,2....

 

[Bt Doctur]

Never looked at the title, thinking 5.7
had #1 cylinder at tdc bumped the dist,back a couple teethe seems to run

Exactly what does that mean?. your supposed to have the piston at TDC compression and install the dist with the rotor pointing
to #1 in the cap.
I still don't believe your using the correct plug wire or cylinder with the timing light.It cant be that far off and still run.

 

[merls bait shop]

hello, thank everyone for all the knowledge on this over the last week or so, i am throwing in the towel and going to take it in to a professional, i will leteveryone know what the issue was..........

 

[merls bait shop]

hello, 1500 rpm at 12 BTDC and the more i retard it it will stall out,

 

[achris]

Check that 12 degrees BTDC is actually 12 degrees BTDC.... Find the top of the stroke on #1 cylinder, doesn't matter compression or exhaust, just the proper Top Dead Centre. Then look at the timing tab on the timing cover and the mark on the harmonic balancer pulley. They should line up at the 0 degree point. Like this....

If they don't come quite close to lining up, then the rubber on the balancer may have slipped. You may need to replace the balancer.

 

[Grub54891]

^^ I asked that also^^ anyway,he's taking it in,probably for the better!

 

[merls bait shop]

Hello, well got a call from the marine mechanic yesterday, he said i have very little compression if any said the rockers were too tight, will dig deeper today he said, hopefully not too deep into my wallet !! so my question is how does this compression problem effect not being able to time it ?

 

[Bondo]

so my question is how does this compression problem effect not being able to time it ?

Ayuh,.... Because it takes 4 things, for a motor to run,.....

Fuel,....

Fire,....

Compression,...

All at the right Time,.....

Without any 1 of the 4, it ain't goona run right,....