My 1512 has become impossible to start. I suspect I have a combination of issues. Starter that takes way to much current to turn over eats L&G batteries. Second problem leaky o-ring on throttle plate, so it looses prime and provides a drain down effect on the injection lines. I already have updated the glow plugs to newer self limiting type with a ford starter relay. I ordered a new starter, added addtional batteries in parallel so I can turn the motor over and purge the injector lines. What am I missing here?