McGR
Senior Chief Petty Officer
- Joined
- Jun 19, 2004
- Messages
- 664
Just got back from my annual trip up north fishing. After a few days into my trip I noticed some missfiring/studdering after taking 15-20 minute runs to my fishing spots. Motor would start up and behave normally in the morning. When slowing down off of cruising speed after the long runs the motor would seem to missfire at lower speeds and when trying to accelerate again. By this time, I'm at the fishing spot, so I go ahead and fish for a few hours. Once cooled off it would behave normally again. It exhibited these symptoms for the remainder of the week. So I ran the boat and was able to get by with it.
Now that I'm home, I'm trying to sort out the issues. Here are some things that I have done to the motor in recent memory.
- New water pump and flush last year after getting into a sand bar. - Seems to pump like crazy now.
- New CDI rectifier regulator last year. Wasn't charging. - New R/R fixed the charging issue.
- Carbs rebuilt/cleaned two seasons back.
- New power pack, wires and fuel pump rebuild within the last five years.
Yesterday, I decided look at a few things to see if there were any obvious issues. Upon inspecting the stator, I saw a puddle of the dreaded goo below it. After a little consideration, I decided that 27 years of operation + the puddle of goo meant a good time to order a new stator. So I did.
I'm just curious, is the goo puddle an absolute kiss of death? I've always been a bit perplexed with this contention. Basically, the goo is an epoxy or poly encapsulent applied to the stator windings for insulation & mechanical and enviornmental protection. I've been working around these sort of electrical potting compounds for many years and it doesn't really surprise me that some may drip given the high temps of the stator region of the motor.
Anyway... hopefully the evidence of goo indeed means my old stator was doomed even though I have difficulty understanding the failure mode. Any further insights are appreciated.
Now that I'm home, I'm trying to sort out the issues. Here are some things that I have done to the motor in recent memory.
- New water pump and flush last year after getting into a sand bar. - Seems to pump like crazy now.
- New CDI rectifier regulator last year. Wasn't charging. - New R/R fixed the charging issue.
- Carbs rebuilt/cleaned two seasons back.
- New power pack, wires and fuel pump rebuild within the last five years.
Yesterday, I decided look at a few things to see if there were any obvious issues. Upon inspecting the stator, I saw a puddle of the dreaded goo below it. After a little consideration, I decided that 27 years of operation + the puddle of goo meant a good time to order a new stator. So I did.
I'm just curious, is the goo puddle an absolute kiss of death? I've always been a bit perplexed with this contention. Basically, the goo is an epoxy or poly encapsulent applied to the stator windings for insulation & mechanical and enviornmental protection. I've been working around these sort of electrical potting compounds for many years and it doesn't really surprise me that some may drip given the high temps of the stator region of the motor.
Anyway... hopefully the evidence of goo indeed means my old stator was doomed even though I have difficulty understanding the failure mode. Any further insights are appreciated.
