oldgit
Well-known member
For the brave only ?
Shortly after purchase of boat the MMC system malfunctioned on one of the engines.
Fortunately happened at low maneuvering speeds, a quick shut down and restart solved the problem, until about 18 months later when it happened again.
Again a quick turn off and on solved the problem.
This time a bit of investigation on the internet and lots of posts, including some on this forum appeared.
All sorts of suggestions as to causes, not a few suggestsing that Volts might be a problem.
Further websearch came up with name of a company that used to install this system many years ago, left a message and they did actually ring me for chat.
A very knowledgeable and helpful chap, suggested it would an expensive event for them to pop up and check my system and suggested a few things that I might like to try.
Check 12v to system and then ensure all wiring connections were clean and secure especially after nearly 25 years of use .
However he suspected from my description of events that the components inside controller might be the culprit and could be worth investigating.
Decided to dismantle the controller and have look.
All fairly basic but bits that might well be the problem were fully encapsulated to prevent water getting inside.
Need to get some suitable switch cleaner inside the rheostats.
No prospect of neatly drilling any holes, heated a drill bit to melt a tiny hole with quick squirt of cleaner/ lubricant to follow.
It is actually functioning after reassembly and only time will tell.
Shortly after purchase of boat the MMC system malfunctioned on one of the engines.
Fortunately happened at low maneuvering speeds, a quick shut down and restart solved the problem, until about 18 months later when it happened again.
Again a quick turn off and on solved the problem.
This time a bit of investigation on the internet and lots of posts, including some on this forum appeared.
All sorts of suggestions as to causes, not a few suggestsing that Volts might be a problem.
Further websearch came up with name of a company that used to install this system many years ago, left a message and they did actually ring me for chat.
A very knowledgeable and helpful chap, suggested it would an expensive event for them to pop up and check my system and suggested a few things that I might like to try.
Check 12v to system and then ensure all wiring connections were clean and secure especially after nearly 25 years of use .
However he suspected from my description of events that the components inside controller might be the culprit and could be worth investigating.
Decided to dismantle the controller and have look.
All fairly basic but bits that might well be the problem were fully encapsulated to prevent water getting inside.
Need to get some suitable switch cleaner inside the rheostats.
No prospect of neatly drilling any holes, heated a drill bit to melt a tiny hole with quick squirt of cleaner/ lubricant to follow.
It is actually functioning after reassembly and only time will tell.