DELCO VOYAGER PROBLEMS

[Raf81]

Recently bought a NEW 3.0 merc. that had a delco voyager installed. Hooked it up, all is good except there's now advance. As a matter of fact the timing actually retards.what are possible problems

 

[alldodge]

Howdy

How about a bit more info on what lead up to the issue. What serial number was the original motor and was anything change? How was timing set, and at what setting?

 

[Rick Stephens]

You might take a picture of the distributor on the wire connector side. There were a couple different EST Delco Voyager models, they had different base mode wiring setups. Sorry to say you have to have three posts before you can use the photo posting within this forum, but you can stick photos on photobucket and link to them.

 

[Raf81]

This one uses the timing shunt with the 12v hook up. Timing set at -1 BTDC as per the spec sheet.

 

[Rick Stephens]

This one uses the timing shunt with the 12v hook up. Timing set at -1 BTDC as per the spec sheet.

That sounds correct. So with nothing at all plugged into the right hand base timing plug, your timing should be somewhere up around 10-12 BTDC. And as you throttle up it should go up counterclockwise towards 23-24 BTDC. You are seeing it go the opposite direction, clockwise on the indicator? If mine did that I would only suspect a bad control module. The EST module is a solid state programmed module that controls advance. Seems to me the module is the only thing that could cause that.

 

[Raf81]

Motor came set on TDC. On initial start up backfired thru carb. Once it started ran pretty smooth. We then hooked up timing shunt and set timing. removed shunt,set idle and brought it up to 1500 RPM. This when we noticed the advance problem. Have not connected up the shift interrupt yet.

 

[alldodge]

Shunt installed which has the two wires jumped together, then connected 12V to the other lead and set timing, correct?

 

[Raf81]

When I removed the shunt the timing did not advance at all.

 

[Raf81]

YES

 

[Raf81]

TIMING ADVANCES CLOCKWISE

 

[alldodge]

I don't think you have an issue. The motor is a Left Hand (LH) rotation motor which is RH at the front. When timing advances the advance goes more clockwise (RH) which starts the firing of the plugs sooner. Looking at a timing light it goes more to the right

 

[Rick Stephens]

I don't think you have an issue. The motor is a Left Hand (LH) rotation motor which is RH at the front. When timing advances the advance goes more clockwise (RH) which starts the firing of the plugs sooner. Looking at a timing light it goes more to the right

That seems backwards to me. If the mark is TDC, then the more advance the further to the left, earlier, the TDC mark will be at flash.... Now my brain is turning CCW.

 

[alldodge]

That seems backwards to me. If the mark is TDC, then the more advance the further to the left, earlier, the TDC mark will be at flash.... Now my brain is turning CCW.

Think of it like this, a LH motor rotates CCW looking at the flywheel, and therefore it rotates CW looking at the front of the motor. The RH rotation is just like a clock, so picture a clock. To fire before TDC (lets say 12 o'clock) it needs to fire at 1 or 2 o'clock, and so on

 

[Rick Stephens]

Think of it like this, a LH motor rotates CCW looking at the flywheel, and therefore it rotates CW looking at the front of the motor. The RH rotation is just like a clock, so picture a clock. To fire before TDC (lets say 12 o'clock) it needs to fire at 1 or 2 o'clock, and so on

Can't be: 1- 2 o'clock is later/after 12 o'clock when looking at the balancer turn CW from in front. You are saying the mark on the balancer at TDC is straight up at 12 o'clock. Then 15? BTDC will be at 11 o'clock well before the mark on the balancer comes up to straight up.

 

[alldodge]

Can't be: 1- 2 o'clock is later/after 12 o'clock when looking at the balancer turn CW from in front. You are saying the mark on the balancer at TDC is straight up at 12 o'clock. Then 15? BTDC will be at 11 o'clock well before the mark on the balancer comes up to straight up.

Just as I said, the rotation is CW, so before it comes to TDC (12 o'clock) it will be passing 6, 5, 4 ,3 ,2 ,1 then 12. So as it passes 1 or 2 this is before TDC

 

[Rick Stephens]

Saying same thing differently. Ain't geometry grand?