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Search: Posts Made By: John B
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Forum: General Q & A
09-24-2003, 10:23 AM
Replies: 38
Views: 7,126
Posted By John B

Joe, Are you saying your exhaust is...

Joe,

Are you saying your exhaust is totally dry now? If so and the sooty transom is gone, maybe part of the problem is as Adivanman says, the water entrains the carbon and it then splatters all...
Forum: General Q & A
09-23-2003, 12:48 PM
Replies: 38
Views: 7,126
Posted By John B

Adivanman, Thanks for the information. I...

Adivanman, Thanks for the information.

I was searching some of my past experiences and remembered motors with chokes set too tight and the black smoke and soot poring out the tail pipes, boats...
Forum: General Q & A
09-22-2003, 08:22 PM
Replies: 38
Views: 7,126
Posted By John B

Adivanman, Very through explanation, it...

Adivanman,

Very through explanation, it has merit. Would this exhaust situation also cause the engine oil to turn black after 5 or 10 hours? Or would this be caused by (running off the cam)?
...
Forum: General Q & A
09-22-2003, 02:10 PM
Replies: 38
Views: 7,126
Posted By John B

Octane

These plugs were run with 87 octane. The first year or so of ownership I ran 89 to 93. Sometimes because of availability, I ran 93. Sooting seemed worse with higher octane.
See picture of...
Forum: General Q & A
09-22-2003, 10:40 AM
Replies: 38
Views: 7,126
Posted By John B

mcollinstn, Good post! makes sense, good...

mcollinstn, Good post! makes sense, good explanation! I must have been thinking carburetors---Da:crazy:

My experience with the 500 efi rev limiter was -- when rpm reached 5400+-, certain...
Forum: General Q & A
09-21-2003, 10:44 PM
Replies: 38
Views: 7,126
Posted By John B

Looks like the dyno test is not bogus after all. ...

Looks like the dyno test is not bogus after all.

Which one of you would, design a system to, cut off some of the fuel at 5200+ under max load with exhaust temperatures in the 1450's?:eureka:...
Forum: General Q & A
09-21-2003, 08:46 PM
Replies: 38
Views: 7,126
Posted By John B

Guys, The Mercury Technical Department told me...

Guys,
The Mercury Technical Department told me two years ago that the rev limiter on the 500 efi cuts the fuel system back at 5420 and turns it back on at 5250. Is this wrong? This seems to be...
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