My neighbor has a 2006 40hp 4 stroke yamaha with very low hrs. It would not stay running this spring and he took it back to the marina were it gets serviced and they said the gas in the in-board tank was gunked up. They installed a filter and water separater and he brought it back and put it in the lake and it ran for a few minutes but started to run poorly again. The marina said it probably has water in the carbs which is a problem with these and the carbs would need to be worked on. It would start up and run for a short while for him then quits. I took the cover off looking for carb bowls (3 cylinder) that might be easily drained to remove water but didn't see anything. While I was there it turned over OK and would almost start but never did. We pumped the gas bulb and tried chocking with the key but nothing helped.
1) Is there someway to drain the carbs on these. These 3 carbs are on the side and stacked pretty tight and I didn't see anything that looked like a carb bowl underneath.
2) I thought about pulling the spark plugs for an inspection and trying to start with starting fluid to clean out the lines but the motor did run for a few minutes at slow speeds when it came back from the marina so I don't know if that experiment would work.
any suggstions?
1) Is there someway to drain the carbs on these. These 3 carbs are on the side and stacked pretty tight and I didn't see anything that looked like a carb bowl underneath.
2) I thought about pulling the spark plugs for an inspection and trying to start with starting fluid to clean out the lines but the motor did run for a few minutes at slow speeds when it came back from the marina so I don't know if that experiment would work.
any suggstions?