mrbarrettbryan
Cadet
- Joined
- Jun 13, 2011
- Messages
- 13
Here is my problem and what i have done so far..
I have a 1980 Evinrude 115 and it seems to run great at idol but at WOT It is surging up and down.. At first i thought it had to be a fuel problem so i replaced all my lines, bulb, line filter, connectors, fuel line from line in to pump and to carbs, rebuilt both carbs, replaced all gaskets, cleaned and went through gas tank, new fuel, cleaned out pick up screen in tank, took apart and checked out fuel pump, checked all lines for leaks.. When i run it at WOT i knew that when it was surging if i was to pump the bulb and it made it run better then it was most likely the pump but pumping doesnt help at all.. After all of that i made the assumption it cant be the fuel.. Sooo here is what i have discovered!! I think im on the track of figuring it out but need some advice from someone who actually knows these motors! I dont like close to a lake so its an all day trip to be able to check to see if it runs good between each thing i have done to it! I finally got the chance to take it to a lake for a long weekend so i could mess and tweek it while on the water! I finally got lucky and i found that if i take the spark plugs out and clean them with a piece or high grit sandpaper and run carb cleaner on them and in each cylinder then replace the plugs and re attach the wires, the engine runs PERFECT at WOT for about 4 hours or so depending on how hard i drive it! I obviously dont want to have to do this every 2-4 hours of boating.. CAN YOU PLEASE HELP!! This is my first boat and this process has been since last fall and its extremely frustrating!! Thank you for any advice!!
I have a 1980 Evinrude 115 and it seems to run great at idol but at WOT It is surging up and down.. At first i thought it had to be a fuel problem so i replaced all my lines, bulb, line filter, connectors, fuel line from line in to pump and to carbs, rebuilt both carbs, replaced all gaskets, cleaned and went through gas tank, new fuel, cleaned out pick up screen in tank, took apart and checked out fuel pump, checked all lines for leaks.. When i run it at WOT i knew that when it was surging if i was to pump the bulb and it made it run better then it was most likely the pump but pumping doesnt help at all.. After all of that i made the assumption it cant be the fuel.. Sooo here is what i have discovered!! I think im on the track of figuring it out but need some advice from someone who actually knows these motors! I dont like close to a lake so its an all day trip to be able to check to see if it runs good between each thing i have done to it! I finally got the chance to take it to a lake for a long weekend so i could mess and tweek it while on the water! I finally got lucky and i found that if i take the spark plugs out and clean them with a piece or high grit sandpaper and run carb cleaner on them and in each cylinder then replace the plugs and re attach the wires, the engine runs PERFECT at WOT for about 4 hours or so depending on how hard i drive it! I obviously dont want to have to do this every 2-4 hours of boating.. CAN YOU PLEASE HELP!! This is my first boat and this process has been since last fall and its extremely frustrating!! Thank you for any advice!!
