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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesRepair of Machinery & Electronic DevicesWiler B. SeedorfHelvetic Diesel GmbH
Helvetic Diesel GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Helvetic Diesel GmbH is the maintenance, repair and sale of spare parts for Detroit Diesel engines, particularly for marine and industrial applications. This also includes performance enhancements and tuning, as well as the execution of inspections and repairs. The company also offers services for emergency power groups and outboard motors.

AI-generated
Offering

Products & services

Industry:Repair of Machinery & Electronic Devices
✓ Offered6
Service for Detroit-Diesel engines
Maintenance, repair and technical support for two- and four-stroke Detroit-Diesel marine and industrial engines; also mobile workshop service and major overhauls.
Detroit Diesel spare parts
Original spare parts for Detroit-Diesel two-stroke and four-stroke engines; the most commonly required parts are available from stock, and other parts can be sourced at short notice via the central warehouse.
Marine gear repair and overhaul
Repair and overhaul of Allison and Twin Disc marine gears, including comprehensive overhaul and spare-part stocking.
SAAB inspections and repairs
Inspections, repairs and major overhauls for the complete Saab drive train with engine, clutch, gearbox, drive shaft and axle differential.
Emergency power generator sets
Sales of an emergency power generator set or a power generator with technical specifications; on-site viewing possible.
Outboard motors
Sale of an outboard motor, including engine stand and tank; on-site viewing possible.
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4.2/5

Helvetic Diesel GmbH

Trust & reputation

ranQ Trust Score of Helvetic Diesel GmbH: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Helvetic Diesel GmbH scores 74.0 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.84.824%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.67.110%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.50.08%
Helvetic Diesel GmbH scores 83.0 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Helvetic Diesel GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
Helvetic Diesel GmbH scores 6.3 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.6.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Helvetic Diesel GmbH reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 13 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 13 reviews across all connected sources

Sources
GGoogle513
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Stückirain 1
3266 Wiler B. Seedorf

At a glance

Legal form
Limited Liability Company
UID
CHE-115.069.231
Founded
2009 · 17 years
Last commercial register change
March 11, 2016
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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