Bryant fish Posted April 10, 2020 Share Posted April 10, 2020 Hi all I have a boat with twin tohatsu m40c motors 1 is not firing bottom cyl had to replace flywheel and trigger and exciter coils a few months ago and everything working fine, noticed running rough last trip pulled ignition leads no change on bottom cylI've swapped plugs ignition coil and cdi unit still no joy any ideas thanks Link to comment Share on other sites More sharing options...
Rebel Posted April 10, 2020 Share Posted April 10, 2020 Hi, There is a Website, maybe that might help you. Cheers. Link to comment Share on other sites More sharing options...
Rah Posted April 10, 2020 Share Posted April 10, 2020 3 hours ago, Rebel said: Hi, There is a Website, maybe that might help you. Cheers. Hey Rebel, Do you have a link to this website? Cheers Rah Link to comment Share on other sites More sharing options...
Smobaby Posted April 10, 2020 Share Posted April 10, 2020 Check the wiring from coil to cdi unit for an open circuit with an ohms metre possibly a broken wire sounds like coil not being powered Link to comment Share on other sites More sharing options...
Rebel Posted April 10, 2020 Share Posted April 10, 2020 Hi Rah, Not very good at linking. If you Google Tohatsu Ouboards it will come up. Best I can do. Cheers. Link to comment Share on other sites More sharing options...
kingie chaser Posted April 11, 2020 Share Posted April 11, 2020 6 hours ago, Rebel said: Hi Rah, Not very good at linking. If you Google Tohatsu Ouboards it will come up. Best I can do. Cheers. Rebel, It might assist more is you can provide the right information over just a fleeting comment, otherwise its not really helping! Just my 2 cents. 1 Link to comment Share on other sites More sharing options...
Rebel Posted April 11, 2020 Share Posted April 11, 2020 I DID. Google the info. Link to comment Share on other sites More sharing options...
kingie chaser Posted April 11, 2020 Share Posted April 11, 2020 (edited) 16 hours ago, Rebel said: I DID. Google the info. Your not getting the point here! Saying I know something but not directing the person to the right place does not help anyone! @Rebel I will try to help you work this out. If you need to provide a link it is quite easy & perhaps I can help you through it? If your on the webpage of the information you want to provide highlight the web address by clicking the left side of the mouse & holding the cursor in front of the last letter or behind first letter then drag the cursor over the web whole address, it should turn blue. When its highlighted right click on the mouse & it will come up cut/copy/undo/select. Select copy, then in your post right click on the mouse & select paste. The address bar of the website will then paste into the thread & provide the right info for the member 😊 The same process can be done if your sending an email to someone as well, it is also just the same as any copy & paste method, in this case you are copy & pasting the URL or web address. Here is a tutorial for you to look at- Just spend a bit of time practicing it & let me know how you go. Hope that helps you? Edited April 11, 2020 by kingie chaser 1 Link to comment Share on other sites More sharing options...
dunc333 Posted April 11, 2020 Share Posted April 11, 2020 f 2stroke i gather next check . spark, fuel ,compression and report back cheers dunc333 Link to comment Share on other sites More sharing options...
Bryant fish Posted April 11, 2020 Author Share Posted April 11, 2020 Hi mechanic checked compression a few months ago all good as it's a twin setup changed coil cod unit over no difference tried again yesterday cleaned all terminals noticed battery connection to motor loose don't think that would make a difference but seems a bit better maybe the terminals now just need to get on the water to test but who knows when that can happen cheers Link to comment Share on other sites More sharing options...
noelm Posted April 11, 2020 Share Posted April 11, 2020 I guess the very first thing to do is verify there is definitely no spark, just because it makes no difference when the plug lead is off does not always mean it has no spark, do that test first. Link to comment Share on other sites More sharing options...
Bryant fish Posted April 12, 2020 Author Share Posted April 12, 2020 After cleaning terminals motor stalls when lead off hopefully fixed but need water test to make sure Link to comment Share on other sites More sharing options...
noelm Posted April 12, 2020 Share Posted April 12, 2020 Kind of hard to believe that a bad battery terminal affected one cylinder only! Link to comment Share on other sites More sharing options...
Smobaby Posted April 12, 2020 Share Posted April 12, 2020 A bad earth can cause major headaches different components are earthed independently which will make fault finding hard. Have had problems previously with a bad earth in control box causing intermittent spark. Link to comment Share on other sites More sharing options...
Bryant fish Posted April 12, 2020 Author Share Posted April 12, 2020 Yeah wasn't only battery terminal loose also cleaned all electrical terminals Link to comment Share on other sites More sharing options...
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