CheshireCat Posted May 29, 2018 Share Posted May 29, 2018 I am in the process of fitting a new starter motor and at the same time have decided to renew the two cables between the starter motor / battery / cut off switch as well as the earth cable to the starter motor. I also need a slightly longer starter motor cable (15cm longer than existing).The cables are 20mm cross section at the moment and wonder if there is benefit in using 25mm cable.Are there advantages and disadvantages of using 25mm rather than 20mm cable ? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 29, 2018 Member Share Posted May 29, 2018 What's the nominal current of the starter motor?Are your cables particularly long?JonathanPS: Are those cable sizes 20 and 25 sq mm area? They are sometimes sized by diameter which might cause confusion. Link to comment Share on other sites More sharing options...
DJ. Posted May 29, 2018 Share Posted May 29, 2018 Thicker cable is heavier, so I would go with similar to what worked OK previously. Link to comment Share on other sites More sharing options...
SM25T Posted May 29, 2018 Share Posted May 29, 2018 Larger CSA gives lower resistance which is better. Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted May 29, 2018 Leadership Team Share Posted May 29, 2018 If the cable isn't getting hot during use (from the current) it's thickness is fine. Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted May 30, 2018 Leadership Team Share Posted May 30, 2018 Clive, out of interest, why is the original cable too short? Have you fitted the starter with the solenoid underneath?Stu. Link to comment Share on other sites More sharing options...
CheshireCat Posted May 30, 2018 Author Share Posted May 30, 2018 Hi StuYes solenoid underneath is that correct ? The terminal is a bit too much of a stretch for the existing cable, As my car has a cut off switch which I understand extends cable length i was thinking using slightly bigger cable might be a good thing and offset length. Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted May 30, 2018 Leadership Team Share Posted May 30, 2018 Yes I've just checked a photo of mine and it's underneath also. I didn't need to alter any cable lengths so if you're 150mm short you must have routed it differently? Link to comment Share on other sites More sharing options...
CheshireCat Posted May 30, 2018 Author Share Posted May 30, 2018 The terminals on the Wosp are further away than my Magnetron was. The original cables may have been made to exactly the correct length for the Magnetron.I think the cable needs to go over the top of the starter motor as the terminal is at the back on the engine side. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now