RMC Swing Thruster Shear Pin
Printed From: myHanse.com
Category: Hints & Tips
Forum Name: 461 / 470
Forum Description: 461 / 470 Hints and Tips
URL: https://www.myhanse.com/forum_posts.asp?TID=14017
Printed Date: 27 March 2026 at 02:05
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: RMC Swing Thruster Shear Pin
Posted By: CharlieHCAN
Subject: RMC Swing Thruster Shear Pin
Date Posted: 17 May 2023 at 00:24
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Hello all I have recently sucked a rope into the thruster and I believe sheared the drive pin off. I have a very basic RMC manual that came with my 470. The manual is very basic in its instructions on replacement of a broken shear pin - remove electric motor (only if you have a 140 or 185 model) and replace shear pin and reinstall the electric motor. So I have a few questions 1. I’m unable to tell what model I have as its only identification is “RMC - Serial Number 001565” 2. What is this now called in Lewmars world now they took these over? 3. Is this work able to be done while in the water ? Anyone done this and have any tips/tricks before I head into this piece of work? Thanks ahead of time Charlie ------------- Charlie 2012 Hanse 470 - "Good Humour" |
Replies:
Posted By: Wild
Date Posted: 19 May 2023 at 10:15
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Hello Normally on the 470 it’s the 185 TT RMC But you can check this 185mm is the diameter of the prop. The Lewmar parts number 559017 SHEARPIN 185TT you can do it in the water. You have to take off the heavy motor 4 bolts Lift the motor and sometimes the drive shaft will come out together with the motor sometimes the shaft stay in place inside de tube There's 2 shearpins one on top of the shaft to make the connection with the motor, one on the bottom off the shaft to make the connection with the gearbox. I hope this works out for you  there’s a possibility the shaft of gearbox is broken that’s a different storyYou need to go on the dry and this gearbox is expensive stuff . ------------- Wild and Wet Belgium 545e#268 |
Posted By: Wild
Date Posted: 19 May 2023 at 10:28
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Gearbox Lewmar 185TT now there’s to different types off ratio’s and I don’t know 🤷♂️ with’s ratio the RMC 185TT have original. You can contact Lewmar for this Parts number 589358 1.5/1 ratio 589357 2.2/1 ratio ------------- Wild and Wet Belgium 545e#268 |
Posted By: CharlieHCAN
Date Posted: 19 May 2023 at 15:23
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Thanks Wild appreciate the reply and information - I had a local yard here in Vancouver confirm the 185 TT model so you are correct! He’s ordered the two shear pins and I will attempt to pull the motor off next week and have a look at the shafts - I hope it’s just the shear pins!! I’ll let you know how it goes. Charlie ------------- Charlie 2012 Hanse 470 - "Good Humour" |
Posted By: CharlieHCAN
Date Posted: 05 June 2023 at 03:26
Well the update on the shear pins is not what I had hoped for - I pulled the motor and found that both shear pins are in good shape still ….now must haul boat and change the gear box! I’ll post pics of the fix so we all have this documented…..of the joys of boating.  - if the fix is the gear box I find it hard to believe the gears went before the shear pins did ….not a great design! Charlie ------------- Charlie 2012 Hanse 470 - "Good Humour" |
Posted By: Wild
Date Posted: 05 June 2023 at 06:59
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Sorry to hear that. RMG changed the material of the shearpin on 2011-2012 just on the moment Lewmar takes over the production. I had a broken gearbox 2011 our 2012 and contact the RMG production manager and I told my the material was to strong and I get 2 new gearboxes (1 spare) in warranty as a compensation.😊 Still with the new shearpins I have broken once again a gearbox so the last one is on the boat. We
------------- Wild and Wet Belgium 545e#268 |
Posted By: CharlieHCAN
Date Posted: 05 June 2023 at 21:13
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Thanks Wild - ok my Lewmar rep says they don’t carry the gear box anymore ….typical! I do however see I can buy some stock from Mauripro - now they sell both the ratios you talk about - are you able to look at the ones you have (spare) and let me know what ratio you have? It will save me ordering from the US and having to ship back the incorrect one once I haul out and replace. Thank you in advance for your time. Regards Charlie ------------- Charlie 2012 Hanse 470 - "Good Humour" |
Posted By: Wild
Date Posted: 06 June 2023 at 07:28
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Sorry But the 2 replacements I get from RMC are the original ones , at that time RMC used already Lewmar gearboxes, and there’s no notice about ratio and not give me the Lewmar parts number. Try to contact Lewmar technical service they has to know the ratio of the old one 2010-2011 they use then on there one Bowtrusters (retractable our fixed)that period I can only check it when I take the gearbox ( our electric motor) of and turn the prop 1 turn to see the result of rotating of the schaft. I do my best to find it out ------------- Wild and Wet Belgium 545e#268 |
Posted By: freno
Date Posted: 07 June 2023 at 11:04
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i have an rmc thruster, spoke to rmc sweden and its the 1,5 version on my 2013 h385 S126-589358 185TT - nav 4/5/6kW, 1,5
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Posted By: CharlieHCAN
Date Posted: 07 June 2023 at 13:55
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Thanks Freno and Wild appreciate your responses, Freno do you have the person you talked with at RMC’s email or phone number I would like to send the serial number on my unit to have them confirm. Thank you Charlie ------------- Charlie 2012 Hanse 470 - "Good Humour" |
Posted By: Wild
Date Posted: 07 June 2023 at 14:21
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The last contact I have Mikael@rmcab.se Tel +46 303 77 4310 ------------- Wild and Wet Belgium 545e#268 |
Posted By: freno
Date Posted: 07 June 2023 at 20:12
| I have the same contact as wild 👍🏻 |
Posted By: CharlieHCAN
Date Posted: 07 June 2023 at 21:45
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Excellent thank you both I have sent off any email - appreciate your time! Charlie ------------- Charlie 2012 Hanse 470 - "Good Humour" |