He says:
.Grind the top of the pump plunger on an angle so the timing will change according to load and rack setting
It's a simple solution, but unless you understand exactly how to do this, I suggest you buy a handful of plungers.
FYI
Avery
HOWTO: Timing Advance for Yanmar and Clones
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HOWTO: Timing Advance for Yanmar and Clones
I posed the question to a fellow who uses these engines for testing and development in a diesel research lab.
He says:
It's a simple solution, but unless you understand exactly how to do this, I suggest you buy a handful of plungers.
FYI
Avery
He says:
It's a simple solution, but unless you understand exactly how to do this, I suggest you buy a handful of plungers.
FYI
Avery
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Byrdman
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Re: HOWTO: Timing Advance for Yanmar and Clones
Avery, which Yanmar engine are we talking about?
If it's the L-Series air cooled singles, the timing is determined by the thickenss of the shim stack under the pump.
If we're talking about the TN(A,E,V)-Series liquid cooled inlines, the top of the pump housing can be ground to get additional advance but only very rare instances require this.
I worked as an Applications Engineer with Yanmar America for seven years.
If it's the L-Series air cooled singles, the timing is determined by the thickenss of the shim stack under the pump.
If we're talking about the TN(A,E,V)-Series liquid cooled inlines, the top of the pump housing can be ground to get additional advance but only very rare instances require this.
I worked as an Applications Engineer with Yanmar America for seven years.
Hi Byrdman;
Perhaps you misread the information. This modification provides automatic (dynamic) timing advance - the timing changes according to load and rack setting. As you have stated, the timing on the Yanmar type L engines is static, preset by using shims. The ability to advance/retard timing similar to the advance on spark ignition engines would be a very significant improvement on the Yanmar type engines when operated in the motorcycle application where there are frequent changes in rpm and load.
Hope this is clearer.
Avery
Perhaps you misread the information. This modification provides automatic (dynamic) timing advance - the timing changes according to load and rack setting. As you have stated, the timing on the Yanmar type L engines is static, preset by using shims. The ability to advance/retard timing similar to the advance on spark ignition engines would be a very significant improvement on the Yanmar type engines when operated in the motorcycle application where there are frequent changes in rpm and load.
Hope this is clearer.
Avery
-
Byrdman
- I luv the smell of Diesel...
- Posts: 156
- Joined: Tue Jan 09, 2007 5:43 am
- Location: Chicagoland, Illinois, USA
- Contact:
We must be talking on two different levels.Avery Frail wrote:Hi Byrdman;
Perhaps you misread the information. This modification provides automatic (dynamic) timing advance - the timing changes according to load and rack setting. As you have stated, the timing on the Yanmar type L engines is static, preset by using shims. The ability to advance/retard timing similar to the advance on spark ignition engines would be a very significant improvement on the Yanmar type engines when operated in the motorcycle application where there are frequent changes in rpm and load.
Hope this is clearer.
Avery
The L-Series injection plunger is a round cylinder and grinding an angle on the top would seem to affect timing only statically.
I guess I don't see how it would chage the timing dynamically?
