19-28 GM

[windswept]

Hi. Just had a replacement engine fitted into my safetrac mark1. All running well but when I go to switch from idle to run it makes an atempt at high revs but almost instantly goes back to idle.it had been laid up for the past few months so not sure if this had affected the control unit. Wiring seems to be all back in place as it was with previous engine. Wind appreciate any advice. ..

[Jase hutch]

Hi, it will be the throttle solenoid adjustment.....it should rev to 1560 rpm max.

without the engine running, locate the throttle solenoid and push the solenoid piston into its body by hand, when the throttle linkage hits its stop screw on the side of the injection pump, there should be a small gap between a nylon nut and the forward most part of the linkage (radiator end). There is a small spring located here (not visible as it's inside a sleeve). If this gap is more than a couple of mm then the solenoid can't hold in and hence it will rev but drop back to tick over..

You will need an 8mm and 10mm spanner to simply lengthen the threaded rod attached to the throttle solenoid..

jase..

 

ps, tickover should be set to 670rpm..

[PeteB]

Top advice again!!!! 

[windswept]

Thanks Jase.
Will do that. Really appreciate the advice. A

[windswept]

Thanks for the advice Jase. 19-28 back in action. [emoji4]