UPDATE: Hard starting Cummins ISM

[Executive45]

Good Morning everyone! Cummins ISM. 95,000 miles. Just had it serviced, replaced water separator, filters etc. including Allison transmission service. Generally used Speedco for service but tried out a new facility in Arizona. My engine has always started within 3-5 seconds, I'll call it a short crank. After service it will still start but it now takes a long crank. That's the best way I can describe it. I'm not used to cranking an engine for an extended period of time. What could be the cause? It appears they used the correct water separator when it was changed Racor RK12963. Any insight will be appreciated....Dennis

[ppine]

Try some additive for diesel to make sure you have gotten all the water out of the system. Many will add some cetane which makes for easier starting. They help take out some varnish in your engine.