Kad 44 gear shift problematic

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Peterclayton68

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Hi All
New to the forum so be gentle. I have a 1998 Fairline T37 with VP Kad 44. The other day I had an alarming issue. While sat on my morning with engines running to charge batteries and give some hot water about 30min in the port engine went into revers on its own. No movement to the gear leaver and the boat started to move back when I reasoned the neutral light was no longe lit and in gear. I immediately stopped the engine. Turned the ignition on and the neural light came in and then off again. I moved the gear into forward and the light came in and off again and when I moved the gear leaver back to neutral again the light came in and the engine stared fine. Stuffed into forward and revers fine. The same has happened twice now. Getting worried to use if happens while docking could be serious! Any help welcome please ?
 
Peterclayton68 said:
Hi All
New to the forum so be gentle. I have a 1998 Fairline T37 with VP Kad 44. The other day I had an alarming issue. While sat on my morning with engines running to charge batteries and give some hot water about 30min in the port engine went into revers on its own. No movement to the gear leaver and the boat started to move back when I reasoned the neutral light was no longe lit and in gear. I immediately stopped the engine. Turned the ignition on and the neural light came in and then off again. I moved the gear into forward and the light came in and off again and when I moved the gear leaver back to neutral again the light came in and the engine stared fine. Stuffed into forward and revers fine. The same has happened twice now. Getting worried to use if happens while docking could be serious! Any help welcome please ?
Click to expand...
Not another one! @volvopaul
 
I know, I have been reading several similar posts. Any advice? I was considering replacing both actuators anyway as plus 20 years old. Also from other posts the potentiometers and check the fuse holder and connections. Would this solve it?
 
Peterclayton68 said:
Hi All
New to the forum so be gentle. I have a 1998 Fairline T37 with VP Kad 44. The other day I had an alarming issue. While sat on my morning with engines running to charge batteries and give some hot water about 30min in the port engine went into revers on its own. No movement to the gear leaver and the boat started to move back when I reasoned the neutral light was no longe lit and in gear. I immediately stopped the engine. Turned the ignition on and the neural light came in and then off again. I moved the gear into forward and the light came in and off again and when I moved the gear leaver back to neutral again the light came in and the engine stared fine. Stuffed into forward and revers fine. The same has happened twice now. Getting worried to use if happens while docking could be serious! Any help welcome please ?
Click to expand...
Contact your nearest dealer and ask for the modification to be carried out from Volvo FOC , it’s the SPM module fitting , takes 5 minutes if helm access to controls is good , plug and play job . If no warranty available then you need the module .
 
Talking with the dealer today, have ordered a pare of the bosh potentiometers as they this this is the most likely cause and are inexpensive so this will be my first try. They said the same that my 44s wouldn’t support the module. Fingers crossed it the pots!
 
volvopaul said:
You May find dealer they won’t play on a 44 , I am not sure your wiring loom will accept the module either as there is a power plug on each engine loom on the later 300 , depends if your edc loom is the 2X 8 pin plug type or the earlier 16 pin round loom .
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KA(M)D44P-B or above has the 2x8 pin EDC connector.

The EDC manual gives details of the changes that were made between the versions...

KA(M)D44P-A ➜ KA(M)D44P-B ➜ KA(M)D44P-C ➜ KA(M)D300-A
 
Peterclayton68 said:
Talking with the dealer today, have ordered a pare of the bosh potentiometers as they this this is the most likely cause and are inexpensive so this will be my first try. They said the same that my 44s wouldn’t support the module. Fingers crossed it the pots!
Click to expand...
Ohh , I would have suggested just to do a lever calibration , silly expensive pots from Volvo .
 
Peterclayton68 said:
Oh, the engineer was quite confident, I got bosh pots £20 each. I’ll fit them myself. What else could it be? Actuators?
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Good job - that's well worth a try then!

@volvopaul is the expert, I only replay what I've read anecdotally over the years.

I doubt that the actuators are the issue but there are microswitches inside them that have been know to cause odd symptoms. Also worth checking the plugs (about 6 inches from the throttle body) for corrosion, check the wiring loom for damage and check all of the connection to the ECU.
 
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