Divider Plate

[mariner man 66]

can anyone tell me the purpose of the divider plate that sits inside the exhaust cover or the rear of my 135 V6 1991 mod and what could happen if the divider plate seal isn't doing it's job.<br />The reason why I ask this is that I was doing a compression check today on my v6 135. I found that it was a bit low at 100 in each pot. I decided to spray same oil into the cylinders to see if this would help increase compression. As I had all the plugs out I noticed as I was spaying the oil in (with spray gun hooked up to air compressor I noticed that this oil vapour was coming out of one of the spark plug holes on the opposite bank of cylinders. Does this mean that the divider seal behind the exhaust cover is no good? Or am I just worried for nothing.<br />I am trying to fault find the cause of the motor bogging down under acc. from idle. Thanks

 

[dakk1]

Re: Divider Plate

I believe the divider plate is designed to divide the 2 banks and for increased performance. The seal is nothing more than a piece of solid rubber hose.<br /><br /> http://webpages.charter.net/dakk1/exhaustdividerweb.jpg <br /><br />On the left is the exhaust manifold cover off of a 1985 Mercury 150hp. On the right is the exhaust divider plate and the seal. I doubt you could spray oil across the seal with a spray gun even if it was bad. With the exhaust port uncovered it would just go out the motor. Path of least resistance. Might be spraying back into the crankcase via the transfer port, depending on the position of the piston. 100 not that low on those cylinders especially if that was cold. Probably not your problem in my opinion. More likely fuel or ignition. Have you checked spark?<br /><br />Dave..

 

[mariner man 66]

Re: Divider Plate

I have Been thru the entire fuel system from tank vent,all fuel lines checked filters replaced, fuel pump overhauled, carbs dismantled,float heights checked, fixed faulty accelerator pump on lower carb....so have removed fuel from the equation. Spark from all six plugs seems weak and are wet with oil, but clean, and plenty of carbon on piston crowns. Have replaced plugs and leads. My next options is to take it to the local merc dealer to do a peak voltage check.<br />I am thinking that the output from the stator is not good as I have done the resistance checks and the results read as for 40amp stator not the 16amp system that is on my motor (identified by smooth flywheel cover and solid cast flywheel)<br />And just how do you get that flywheel off?<br />Have tried using a standard automotive type puller and ended up damaging the thread on it (not the thread on the end of the crankshaft thankfully)<br />Any other thoughts welcome.

 

[dakk1]

Re: Divider Plate

You need the regular puller that threads into the flywheel. You can buy one on Ebay for about $25 US. If you want to check the ignition voltages yourself, you can buy a DVA (direct voltage adapter) for about $35. It works with a multimeter or voltmeter. I wouldn't replace any of the ignition components based on resistance readings alone. Good Luck.<br /><br />Dave..

 

[mariner man 66]

Re: Divider Plate

thanks dave,<br />I'll get right tools to avoid creating any further problems!