MISSING; AND FOULING PLUGS

[new owner]

I recently purchased a boat and it has a 1977 or 78 45hp Chrysler outboard engine in it model number 457HD. The first time I had it out it bogged itself down and killed itself. I got a tow back to the dock and I found out the plugs were carbon fouled. I replaced the plugs with hotter NGK's. It still fouled out the plugs. Aftet futher investigation I noticed the engine had a slight miss to it and the bottom spark plug fouled a lot quicker than the top plug. I have done a compression test and they both were around 110 lbs. I also looked at the points and one was black so I am going soon to replace the points and condensers. I am wondering if the coil pack for this year engine goes bad. I also am wondering if the timing cound play a role in the foul of the plugs. Any help would be greatly appreciated.

 

[sproz]

Re: MISSING; AND FOULING PLUGS

Hi,<br />i dont know anything about your engine but it sounds like its running too rich,were the plugs oily? Maybe someone will post you the correct carb settings for your motor.

 

[new owner]

Re: MISSING; AND FOULING PLUGS

Thanks ShadyAde,<br /> I have read on here before the mixture for the gas is 50:1 and use TCW-3. I have tried to set the carb float but don't have a manual yet...it is supposed to be in the mail. thanks again hopefully someone can walk me through how to set the carb. I have tried the needle valve above the float and it did not help.

 

[new owner]

Re: MISSING; AND FOULING PLUGS

Anyone have any ideas other than what i have said i am going to do.

 

[Hooty]

Re: MISSING; AND FOULING PLUGS

The problem could be with the float/needle & seat but your manual will have a trouble shooting section and diagrams of the carb.<br /><br />c/6<br /><br />Hooty