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The motor is a 1975 Evinrude 85 H.p. the manual says to set the idle at 600 to 650 rpm when I do this and then replace the engine cover the restricted airflow causes the rpm's to drop to 500 or 550 I know this is not a major issue but out of curiousity when designed was the idle supposed to be...
The original problem started with a fouled spark plug on the number 1 cylinder on a 1975 v4 85 hp evinrude. I got the boat back to the landing at the end of last season and let it sit (fast foreward till now). I cleaned all connections, charged the battery fully, I pulled all the plugs and...
Here is the background: the engine is a 1975 85 evinrude I have been chasing down a problem with intermitent spark that started on the number 1 cylinder and now has moved to all four. Battery is new and fully charged. It will no longer run. I swapped out a power pack with a good running...
The engine is a 1975 85 evinrude it looks like it needs a new power pack as 1 cylinder has intermitent spark, and coils as two are starting to develop hairline cracks. The compresion is 130 in all holes and it has T&T. my question is given the cost of a replacement with a newer (late 1990's)...
I have a 1975 v4 85hp motor that seems to have all the original ignition parts. The problem I am having is an intermittent loss of spark to the number 1 cylinder when using a spark tester with a good battery and all four plugs removed. I have swapped coils with one that is firing fine and see...
