Craftsman Marine — Adjusting the engine speeds
Adjustments · Governor
From a Craftsman Marine service manual — check it applies to your exact model before use.
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Before you start
- Never attempt to open the sealed HIGH-SPEED stopper bolt seal unless necessary.
- Never remove the sealing cap unless it is necessary to adjust the torque spring set.
Procedure
- Remove the cooling fan and install a safety cover over the fan.
- Adjust upper limit of engine speed with the HIGH-SPEED stopper bolt.
- Adjust lower limit of engine speed with the LOW-SPEED stopper bolt.
- Warm up engine before adjusting speeds.
- After adjustment run acceleration/deceleration test to confirm no hunting or smoking.
Specs & values
- Warm up until coolant temperature rises to 60°C [140°F] or above before adjusting
Source: Craftsman Marine service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.