Yanmar 1GM10 - bits from manual starter

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fjweaver

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Changing the engine anode at the weekend I found these 2 bits sitting in the tray under the engine.

They seem to come from the end of the crankshaft for the starting handle.

The pin has a flat section midway and looks like it’s held in place by a bolt/screw on the end of the crank ( a bit worrying is that I can’t find it lying around anywhere….)

The ring doesn’t look like it’s been welded but looks like it’s glued somehow to the end of the crank to act as a guide (?) for the handle to go in.

Any ideas on fixing please?

Thanks
Frank
 

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Has anyone ever managed to handstart a 1GM? When I was younger and fitter I tried but every time, no matter how fast I wound it, as soon as the decompression lever was dropped it just bounced back off the compression. Engines with heavier flywheels are easy to start but not, in my experience, Yanmar's baby.
I'd throw the bits into the gash box and forget about them!
 
fjweaver said:
Changing the engine anode at the weekend I found these 2 bits sitting in the tray under the engine.

They seem to come from the end of the crankshaft for the starting handle.

The pin has a flat section midway and looks like it’s held in place by a bolt/screw on the end of the crank ( a bit worrying is that I can’t find it lying around anywhere….)

The ring doesn’t look like it’s been welded but looks like it’s glued somehow to the end of the crank to act as a guide (?) for the handle to go in.

Any ideas on fixing please?

Thanks
Frank
Click to expand...

The thin circular bit is the surround to the starter crank and the other bit has come out of the spindle where there is now an opening. Can't see that they are vital bits.
 
awol said:
Has anyone ever managed to handstart a 1GM? When I was younger and fitter I tried but every time, no matter how fast I wound it, as soon as the decompression lever was dropped it just bounced back off the compression. Engines with heavier flywheels are easy to start but not, in my experience, Yanmar's baby.
I'd throw the bits into the gash box and forget about them!
Click to expand...
I did,many times.I owned a 1GM10 from new and handstarted it routinely .
 
I reckon the pin has slid out of the crank while running, and in the process (while being whirled around) it sliced off the protective shroud.

Pete
 
Not too difficult to hand crank IGN10's-the trick is to drop the decompressor at EXACTLY the right time,with enough "way" on the cranking.
This assumes the engine is normally a good starter and only battery state is making hand cranking a requirement.
 
Its going to be difficult now to hand start the OP's engine. The pin that has fallen out of the end of the camshaft is surely the pin with which the starting handle engages.
 
I had the same pin come loose some years back. It is held with a grub screw and caused a squealing noise that I fortunately traced quite quickly.
I suggest that you get a new grub screw and a pin is the one you found is damaged. Then keep them in a safe place to fit only if needed in an emergency.
In this way you have no great fear of the pin rotating without a shield. I suspect you may never need it, bit you have the peace of mind that you can if really pushed.
 
KenMcCulloch said:
I think you are the exception. I had one for four years and never managed to get it started using the handle. I did manage to get it to start running backwards a couple of times though. Very alarming.
Click to expand...
The trick was to get the engine to spin realy fast and then drop the decompressor.It was never a problem for me.
 
I tried on one occasion - but many times - to start my 1GM10, and failed completely. The problem was that because of the layout of my boat, I can't get in to wind it up ergonomically, and in fact the only way I can get up even moderate speed while decompressed is backwards, which isn't much use.
 
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