21193276 Main Spring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta main control spring for the mechanical fuel-injection governor on D1-30F engines. Spring rate and free length determine governor response, rated-speed control and stable return of the fuel-control mechanism, so a general-purpose spring must not be substituted.

🚤 Compatibility

Typically suits:

• Volvo Penta D2-40F
• Volvo Penta D1-30F

• Engine Family: D
• HP Range: 30-40 HP

⚙️ Key Features

• Genuine Volvo Penta calibrated governor spring
• Used inside the mechanical fuel-injection governor
• Controls speed response and fuel-rack loading
• Must retain the specified spring rate and installed length
• Replace if stretched, corroded, overheated or distorted
• Engine type: Volvo Penta D1 three-cylinder mechanically injected marine diesel

🔌 Function

Balances governor forces to maintain commanded engine speed and stable fuel delivery across load changes.

⚠️ Common Signs of Failure

• Hunting or surging at steady throttle
• Incorrect high-idle or governed speed
• Slow return to idle
• Unstable fuel-rack movement
• Visible spring stretching, corrosion or broken coils

🛠️ Service Notes

• This spring supersedes 21192095, so an existing D1-30F/D2-40F parts list may still reference the earlier number for the same spring
• It is confirmed for D1-30F and D2-40F only; the D1-13F/D1-20F engines use a different main-spring reference (21189687), so do not cross the two even though they share a similar mechanical fuel-injection governor design
• Compare free length and coil count against the spring removed before fitting, and never stretch or reshape a spring that has taken a set — fit the correct replacement instead

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21193276 → Supersedes 21192095

OEM / Related Numbers

• 21192095 earlier number superseded by this part
• 21187328 - governor assembly
• 21189685 - return spring
• 21191838 - adjusting screw
• 21189174 - setting bolt
• 21187733 - governor shaft

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging