After 2 hours at anchor both engines refused to crank (not battery)

[Meagain]

So …. Many thanks for all your comments, the issue has been found and I share for information, closure and you never know may be helpful to someone else.

Key lesson, never believe what part you have been supplied without checking it. The issue was indeed voltage, but what confused the engineer was that multimeter readings were upwards of 12v and earths seemed fine. The new starter motors supplied were in error 24v solenoid should have been 12v! Batteries are opening around 75%. It would seem while on shore power at around 14v it was enough to energise the 24v starter, off shore power the battery seemed to just kick out enough for one go but was marginal. Of course was happening to both engines as both had replacement 24v starter motors. Correct ones fitted and now all working ….. phew!

 

[volvopaul]

So …. Many thanks for all your comments, the issue has been found and I share for information, closure and you never know may be helpful to someone else.

Key lesson, never believe what part you have been supplied without checking it. The issue was indeed voltage, but what confused the engineer was that multimeter readings were upwards of 12v and earths seemed fine. The new starter motors supplied were in error 24v solenoid should have been 12v! Batteries are opening around 75%. It would seem while on shore power at around 14v it was enough to energise the 24v starter, off shore power the battery seemed to just kick out enough for one go but was marginal. Of course was happening to both engines as both had replacement 24v starter motors. Correct ones fitted and now all working ….. phew!

Obviously some aftermarket sourced parts , fwiw I always test a new motor before it goes on especially a D4 .

 

[Bigplumbs]

Glad you got it sorted. Are you able to go back to who fitted the wrong starters to get that money back and perhaps also some of the costs of this situation as it seems they caused it ?