Sierra Ignition Rotor SIE-18-5425
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Sierra SIE-18-5425 is an ignition rotor for selected Volvo Penta marine distributor applications. Current aftermarket listings consistently identify it as a Prestolite-style rotor and an interchange for Volvo Penta 834975 and 834975-5.
Key Features
- Ignition rotor
- Sierra part number: 18-5425
- Prestolite-style rotor
- Common interchange for Volvo Penta 834975 and 834975-5
- Common aftermarket interchange also includes GLM 71050.
Engine Compatibility
Common listings tie Sierra 18-5425 to selected Volvo Penta stern drive and marine gasoline applications using the matching Prestolite distributor setup. One fitment listing specifically shows Volvo Penta 8-cylinder applications including AQ200C, AQ225C, AQ255A, AQ190, AQ240, AQ255B, AQ280A, AQ260B, AQ200D, AQ225D, AQ260A, AQ290A, AQ260, BB225, and BB260 with Prestolite distributor IBM-7011B. Fitment should still be confirmed by engine model, distributor type, and original rotor number before ordering.
Serial Number Fitment Notice
Fitment should be confirmed by engine model, serial number, and installed distributor type before ordering. Rotor fitment is distributor-specific, so matching the original Volvo Penta number and distributor style is safer than matching by engine family alone.
When This Part Needs Replacement
Replace when the rotor shows burning, carbon tracking, corrosion, cracking, looseness, or visible tip wear, or when distributor service reveals inconsistent spark transfer. Rotor condition directly affects ignition performance and spark delivery.
Installation Notes
Install only on the correct Prestolite distributor application. Confirm the replacement matches the removed rotor exactly before installation, and inspect the distributor cap at the same time. This rotor is commonly sold as a direct replacement for Volvo Penta 834975 / 834975-5, so matching the original part number is the safest approach.
Alternate / Superseded Part Numbers
- 18-5425
- Volvo Penta 834975
- Volvo Penta 834975-5
- GLM 71050
- Crusader 834975
- Quicksilver 803322
Parts Desk Insight
This rotor is best matched by distributor type first. Sierra 18-5425 is consistently described as a Prestolite rotor, which is the key detail that separates it from similar Volvo Penta rotor listings that look close but fit different distributor families.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.