Stuffing tube — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/stuffing-tube/  (sheet CC BY 4.0)
Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Catalog version: 2026-10-20

Sizes: see table below
- The stuffing tube carries the flex shaft from motor to strut through the hull and keeps water out. Keep it as straight as possible from hull exit to strut (Model Gas Boats).
- One RC mono uses a 7 mm x 210 mm tube with 31 mm exiting the transom; strut offset creates a slight S-bend (SV Design; Model Gas Boats forum).

parameter  value or range  source
Stock tube  7 mm dia x 210 mm, 31 mm exit  SV Design (Stealthwake)
Exit target  up to 57 mm (~10% of length)  SV Design (Stealthwake)

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Model Gas Boats: Some tips on setting up a hydroplane hull — web — Publisher's page; dimensions are facts — https://modelgasboats.com/magazine/tech-articles-mainmenu-608/369-hydro-setup-tips
- SV Design: Pro Boat Stealthwake upgrades info (Feb 2022) — web — Publisher's page; dimensions are facts — https://myplace.frontier.com/~sv_design/Pro%20Boat%20Stealthwakes%20Upgrades%20Info%20SVC_Feb-2022.pdf
- Model Gas Boats forum: Need help setting up a mono for the first time — web — Publisher's page; dimensions are facts — https://www.modelgasboats.com/forum/13-ask-the-editors-discuss-articles-general-boat-questions/21138-need-help-setting-up-a-mono-for-the-first-time

No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.
API: https://xemstudio.com/api/geometry?object=stuffing-tube