Mercury MerCruiser Quicksilver Trim / Trailer Switch Assembly 18286T34
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Overview
Part Number: 18286T34 (service format: 87-18286T34)
Brand: Mercury / Quicksilver
Official Product Type: Trim / Trailer Switch Assembly
Supersedes: 18286A33, 18286T33, 18286A22
GTIN: 745061123359
System: Helm Remote Control — Trim / Trailer Switch Circuit
The Mercury Quicksilver 18286T34 is a genuine OEM trim and trailer switch assembly for selected MerCruiser mechanical remote controls. Positioned inside the control handle, it gives helm-side push-button control over sterndrive power-trim and trailer functions. Mercury parts diagrams place this component in the Commander-series control handle assembly and identify it specifically as the MerCruiser application of the switch — not the outboard version.
Key Features
- Genuine Mercury Marine / Quicksilver OEM switch assembly
- Controls sterndrive power-trim and trailer functions from the helm
- MerCruiser-specific switch geometry and wiring — not interchangeable with outboard versions
- Fits selected Commander 3000 Classic and Commander Classic mechanical remote controls
- GTIN: 745061123359
Compatible Applications
- Mercury Commander 3000 Classic mechanical remote control
- Mercury Commander Classic mechanical remote control
- Selected MerCruiser panel-mount mechanical control assemblies where the parts diagram calls for 18286T34 or 87-18286T34
Fitment Notice — MerCruiser vs. Outboard Versions
Mercury produces several trim switch assemblies that look similar but are application-specific. Confirm you have the correct version before ordering:
- 18286T31 — Outboard switch assembly
- 18286T32 — Bayliner / outboard switch assembly
- 18286T34 — MerCruiser trim / trailer switch assembly (this part)
Always match to your exact remote control model and the Mercury parts diagram for your control assembly.
Dimensions & Weight
- Weight: Approx. 0.12 kg (0.26 lb)
- Packed dimensions: Estimated approx. 12 cm × 8 cm × 5 cm
When to Replace
Replace this switch assembly when the trim or trailer function becomes intermittent, stops responding, only works in one direction, or when the switch body, actuator, or wiring shows physical damage or water intrusion. Because helm trim control is essential to safe drive operation, a faulty switch should be addressed promptly.
Installation Notes
- Disconnect battery power before opening the control handle or handling any wiring
- Remove the control handle per the applicable Mercury service procedure
- Compare the replacement switch wiring and connector layout against the original before installation
- Inspect the control grip, switch cavity, wiring harness, and surrounding handle hardware while the control is open
- Confirm connector type and button geometry match the original before reassembly
Superseded / Alternate Part Numbers
- Current: 18286T34 / 87-18286T34
- Supersedes: 18286A33, 18286T33
- Earlier reference: 18286A22
Technical FAQ
Q: What is the difference between 18286T31, T32, and T34?
A: All three are trim switch assemblies in the same family, but they are application-specific. The T31 is for standard outboard controls, the T32 is for Bayliner and certain outboard applications, and the T34 is the MerCruiser sterndrive version. The switch geometry, wiring, and connector can differ — using the wrong version may result in an incorrect fit or wiring mismatch inside the handle.
Q: Does this switch cover both trim and trailer functions?
A: Yes. The 18286T34 assembly handles both the power-trim (adjusting drive angle underway) and trailer (full tilt-up for trailering) functions from a single helm-mounted control.
Q: How do I confirm this fits my control?
A: Locate the Mercury parts diagram for your specific Commander remote control model. The diagram will identify the correct switch assembly by part number. If you have the original switch in hand, the part number is typically stamped or printed on the component.
Parts Desk Insight
The most common ordering mistake with this part is selecting the outboard version (T31 or T32) instead of the MerCruiser version (T34). The controls can look nearly identical from the outside. If a customer is unsure which control they have, the control model label is usually on the back of the helm unit — that model number is the safest way to confirm the correct switch before ordering.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.