Ignition switch?, lazy starter Options

[JimN73]

Sometimes, fairly often, the starter motor turns over slowly and may (or may not) speed up after a second or so. The engine starts. 30 seconds later, it may fire right up.

Doesn't seem to matter if the engine is warm or cold.

The starter has one of McMarks magical relays.

I've checked the grounds and the wiring - all is tight. So the ignition switch seems to be the last optin.

Anyone seen this before?

thanks,

[jcd914]

If the issue is the speed (RPM) the starter turns the engine over at, then you can rule out the ignition switch and hot start relay. The ignition switch and /or hot start relay only control the engagement voltage to the started solenoid. So if the starter turns over the ignition switch has done it's job.
It has no impact on the speed at which the started turns. The current to drive the starter motor flows through the solenoid.

The speed the starter turns at is dependent on the ability of voltage and amperage to flow through the starter. How much voltage and amperage is required depends on how much work the starter is trying to do.
So something is limiting the voltage and/or amperage or the starter is having to do more work than normal.

Have you disconnected the battery cables and cleaned the connections?
Have you disconnected and cleaned the ground connections?
What is the condition of the battery?
Does the starter make abnormal noise? grinding, rumbling?
The starter bolted tightly in place?

Jim