Inline 6 no start after head off

[Ralbasi]

I have a 165 Mercruiser, Boat was running great. Broke a plug off in the #1 spark plug hole. Got rest of plug out with an easy out but broke off a small piece that had to be retrieved Removed manifold and head. . Engine rebuilt 6 years ago with low hours every thing looks in great shape, Very clean. Put all back together.Adjusted vales as per book. Verified tdc at # 1 with compression. Rotor point to number one. Started and ran very bad. Had to set ideal up and almost close mixture screws. Checked timing. Right on, electronic ignition Spark look good Compression 180 +- 5 down the line. Double checked valve timing.
Took of carb cover could see fuel in intake manifold.. The manifold was not changed at rebuild so I bought new one and put it on. Now will not start at all. kicks a little at first then nothing.

 

[alldodge]

Howdy

You say it "Started and ran very bad"

Now replaced the manifold, so as which of the needed ingredients do you not have?

Air, spark, fuel or timing

Edit: if you click in my signature there is a link to the adults only section and a list of things to do to find your issue

 

[Ralbasi]

Can't seam to get to your Adults only section.

 

[Barnacle_Bill]

Click the last line in his post. It says "Merc Adults Only".

 

[Ralbasi]

Ok Nothing there I haven't tried

 

[alldodge]

Here is the section on how to troubleshoot. If it does not work then your issue is on your end
http://forums.iboats.com/forum/engi...hooting-your-engines-starting-system?t=167035

Are you using your phone or computer?

 

[oldsub86]

I think I would start by again verifying that I was on the compression stroke on #1. We just went through this with an inline 6. Had the distributor out and when we put it back in, it did not want to start. We were off on the distributor and had to check and re-set. Then it fired up and ran fine.

 

[Ralbasi]

Yes I will check that again. Distributor was not out but I cloud off miss adjusted the valves. But compression is good. ??
I am replacing the plugs as I see a different number listed in the book and wires. Don't think it the problem as it ran great before I broke the plug.off, But they don't owe me anything. It can't hurt

 

[Ralbasi]

Checked #1 cylinder tdc with compression gauge Rotor points to #1 Replaced wires and plugs. Checked timing with timing light. Sparks ;look healthy. Checked every lead for spark. Vacuum seams good at carb. NO START. Took off carb gas laying in bottom. Pulled plugs they are dry.

Something cracked in the head some where?

 

[alldodge]

Took off carb gas laying in bottom.

Did you see gas before you took the carb off? IF you did, well that's not it, but if you didn't look, maybe carb. Try a shot of starting fluid

Something cracked in the head some where?

I don't think so. I was going to say maybe the timing chain broke, but you have spark on all cylinders so that's not it.

 

[JoLin]

Dumb question, but it's a stunt most of us DIYers have pulled at some time or other- are the ignition cables going to the right cylinders?

 

[Ralbasi]

Carb had gas throttle pump was pumping gas. Tried staring fluid. Again plugs dry. Definitely have spark, can't get gas into cylinders. I think I will take the head off and take it ti a machinist and have them grind the ports. Or buy a rebuild.

 

[alldodge]

Carb had gas throttle pump was pumping gas. Tried staring fluid. Again plugs dry. Definitely have spark, can't get gas into cylinders. I think I will take the head off and take it ti a machinist and have them grind the ports. Or buy a rebuild.

Before you do that would you mind pulling the valve cover and crank the engine over to see if the valves are moving?

 

[NHGuy]

While the valve cover is off remove the distributor cap and bump over the motor by jumping the starter solenoid. Watch the valves on #1 as the timing mark on the harmonic balancer comes around to top dead center. When both valves are closed as you hit TDC the rotor should be pointing at #1.

 

[Ralbasi]

Thanks. All valves are moving. I checked #1 @ TDC Rotor point to #1 Had my dad go over timing, compression, firing order with book to make sure I was not missing anything.. Plenty of suction at carburetor. Nothing, the only way I can get a kick out of it is to spay starting fluid directly into the intake manifold with carb off. If I spay into carb with in on. Nothing...

 

[alldodge]

Took off carb gas laying in bottom.

I can get a kick out of it is to spay starting fluid directly into the intake manifold with carb off. If I spay into carb with in on. Nothing...

Gas laying in the intake and no start, will hit if using starting fluid.

OK what does the gas smell and look like. You sure it's not water or real bad gas?

 

[Bondo]

the only way I can get a kick out of it is to spay starting fluid directly into the intake manifold with carb off. If I spay into carb with in on. Nothing...

Ayuh,.... Welcome Aboard,.... That makes No sense, at All,....

Maybe AD is right, 'n yer tryin' to light off water/ rotten gas,..??