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Bukh DV20 starter motor fix

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Tazling View Drop Down
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Joined: 16 Jan 2013
Location: Cortes Isl BC
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Posts: 23
Post Options Post Options   Quote Tazling Quote  Post ReplyReply Direct Link To This Post Topic: Bukh DV20 starter motor fix
    Posted: 15 Jul 2013 at 2:19am
I have been going through some new-owner fun and games with my venerable JJT Contessa;  the (Bosch) starter motor packed it in and I ordered a rebuild (ouch!) which arrived promptly but after installation was still flaky.  Much despairing, checking of wires, etc.  The behaviour was interesting -- it would always work on the *second* try.  (The previous starter had stopped working altogether, would just wail away w/o ever turning the engine over;  so "2nd try" was an improvement but still bothered me.)

So after a lot of head scratching and cussing, I tried one "dumb" fix which seems to have made quite a difference... thought I would share it with you all.

I greased the teeth of the big Bukh flywheel and also the teeth of the small pinion gear that shoots forward to engage it.  Both were pretty dry and the flywheel had some surface rust.  After greasing, the starter motor consistently engages first time, every time.  Of course, I had to clean up a fair amount of grease that was flung about enthusiastically by the flywheel :-)  but that seemed a small price to pay for success.

This may be a complete no-brainer for a more experienced mechanic, but for me (more of a deck monkey than a grease monkey) it was new info so I thought if anyone else is having flaky DV20 starter issues, you might want to give it a try.
..... Bound is boatless (wo)man .....
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Richard Ritchie View Drop Down
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Joined: 13 Jul 2009
Location: Winchester
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Post Options Post Options   Quote Richard Ritchie Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jul 2013 at 9:19am
I have a similar situation with my 2GM20:  it starts very reliably, but often the start button needs to be tried a second time, especially from cold.  I can find no explanation.
No amount of wirechasing and switch cleaner has made any difference so I live with it. 
Iwill see if grease can be applied.
Richard Ritchie
Badger of Baltimore
IRL 120
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