VP 4.3GL

[John]

My Volvo Penta 4.3GL runs fine and smooth...... at least.....if it will start. And that is not the case, neither cold or warm!

I start up as followed:

Note: Ignition is on all the time

1 - crank engine for about 3 seconds to build up fuel pressure,

2 - move to Wide open Throttle 2 times and the 3rd time leave the throttle a bit forward 

3 - crank the engine several times, but sadly it won’t start running.

here is what I checked,

• fuel pump is new ok, there is full fuel pressure on the carb inlet.
• electric choke fully functional, 
• idle screw (2x) adjusted
• the preload injectors (right underneath the choke valve) are clean and open
• while moving throttle lever to WOT, theres is no ”preload” of fuel.

here is what I did,

• Toke off the flame arrestor and sprayed fuel directly into the carburator, (disk washer bottle, 2 squeezes)
• Cranked the engine and it fires up in an instant, runs smooth and no vibrations. Everything seems okay.
• Test run engine, no problems occured.
• stopped warm engine, waited for 30 seconds..... and cranked the engine.
• Engine does not not start (grrrrrrr.....)
• put in some fuel from the top........ fires up in an instant.

everytime I want to start I have to ”preload” manually first, very annoying. 

 

Anyone who can give me some advice.

pls. assist

thanx, John

 

 

 

[Gasglad]

Sounds like your accelerator pump for preloads are not working properly. I have never owned a VP 4,3 but a Merc 4,3 and I guess they are pretty much the same.

Probably some linkage issue on the carb or a membrane.

Take your Carburator to a someone that knows what his doing ang get it fixed is my suggestion.