OK the last three motors I have owned have been Johnsons...this is my first Merc ('98 90ELPTO 2 stroke) so I am learning the differences.
I just drained and filled my lower unit. After getting the plugs back in I noticed there was a 3rd plug labled "vent". I had only removed the bottom fill plug and the oil "level" plug. On my Johnson motors, the "vent" and "level" plug were the same one so essentially on the older Johnsons there are only 2 plugs as opposed to this Merc with three. I basically did the change the same way I did my Johnson mortors; removed the fill plug, removed the level plug, let it drain and drip, screwed in the oil pump (to the bottom fill hole), pumped it up till oil ran out of the level plug, installed the "level" plug, removed the pump and installed the fill plug...I am waiting on my manual but in the mean time I guess i need to know if I need to go back and re-do anything a certain way using that vent plug? Better safe than screwed I guess...thanks
I just drained and filled my lower unit. After getting the plugs back in I noticed there was a 3rd plug labled "vent". I had only removed the bottom fill plug and the oil "level" plug. On my Johnson motors, the "vent" and "level" plug were the same one so essentially on the older Johnsons there are only 2 plugs as opposed to this Merc with three. I basically did the change the same way I did my Johnson mortors; removed the fill plug, removed the level plug, let it drain and drip, screwed in the oil pump (to the bottom fill hole), pumped it up till oil ran out of the level plug, installed the "level" plug, removed the pump and installed the fill plug...I am waiting on my manual but in the mean time I guess i need to know if I need to go back and re-do anything a certain way using that vent plug? Better safe than screwed I guess...thanks