Merc 115 1974 serial 3272927(no spark!!!)

[phatmanmike]

Re: Merc 115 1974 serial 3272927(no spark!!!)

stan, you should have only 75-73 ohms through the coil to ground, via the KING LEAD, as per my clymer manual.<br /><br />go on ebay, and search for a member named "clams_canino"<br /> http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2485558697&category=26455 <br /><br />contact him, he has every part you could ever need, and all his parts are guaranteed!!!!<br /><br />btw, the trigger is part of the distributor assy

 

[stant1man]

Re: Merc 115 1974 serial 3272927(no spark!!!)

ye, looks like he has loads but im in the uk and it looks like he only ships to United States and North America.<br /><br />I got a quote from mercury and the coil costs £201.85. Thats $368.11??? Arrrrrrggghhhh! <br /><br />Do you recon my coil is knackered then mike?

 

[achris]

Re: Merc 115 1974 serial 3272927(no spark!!!)

Hi Stan,<br /><br />Looks like all things are pointing to the trigger. You asked what the trigger is. It lives inside the distributor and acts just like a set of breaker points. Inside the dissy is also a rotor plate. it has slots in it that the trigger 'sees' and sends a pulse to the power pack. The power pack then drops about 400 volts across the coil, thus producing the spark. Too easy.<br /><br />In your other post Chris4564 lists a way of getting the powerpack to produce a spark. this effectively tests proves the rest of the system, isolating the trigger.<br /><br />Chris...........

 

[phatmanmike]

Re: Merc 115 1974 serial 3272927(no spark!!!)

coils here are only 32 dollars, whatever that is in pounds....????<br /><br />please email me direct at either of my emails listed below, as im sure i have something to help you as far as the needed parts go<br /><br />m ikey

 

[stant1man]

Re: Merc 115 1974 serial 3272927(no spark!!!)

Thanks for the prompt reply guys. I did run the test that Chris1956 recommended in where i completely disconnected the distrubutor wires. I think that the test "should" have caused a spark, however my engine did not? I think that this has eliminated the trigger for the time being simply because it wasn't connected. <br /><br />I think I am left to suspect the coil or the switchbox. The coil i have is like a an "orange block thingy" there apears to be two different coils used on that engine between 1970-78. My engine i believe is 1972 and has the early type coil. <br /><br />Thanks Again<br /><br />Stan

 

[stant1man]

Re: Merc 115 1974 serial 3272927(no spark!!!)

this kinda looks like it... http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=1294&item=2485586650&rd=1&ssPageName=WDVW

 

[Chris1956]

Re: Merc 115 1974 serial 3272927(no spark!!!)

Stantman, You appear to have the early coil, The newer-style coil is much more compact and attaches by three 1/4" X 3" fine thread screws.

 

[phatmanmike]

Re: Merc 115 1974 serial 3272927(no spark!!!)

<br />this is everything you could need, all in one!!!!!<br /><br /> http://cgi.ebay.com/ebaymotors/ws/e...tem=2485730343&category=31284&sspagename=WDVW <br /><br />if they say they wont ship to the uk, i could pick it up fpr you and shipp it myself. just lemme know. we are all here to help!!!

 

[stant1man]

Re: Merc 115 1974 serial 3272927(no spark!!!)

Thanks so much mike. I went down to my local marina and had a chat with the Mercury dealers. Honestly, they couldn't be more helpful, a fantastic bunch. They sold me a second hand coil for £30 with a warranty. I replaced it and my engine still didn't fire. I didn't mind though cause at least thats that part eliminated. Im almost certain its the switch box so im going to go back down tomorrow and see if they have one. <br /><br />Assuming now that my coil is ok, I failed the Chris1956 test. Quite safe now i think to assume the switch box a cerial box!<br /><br />I'll try local and if I cant get it ill give you a shout mike.<br /><br />Many many thanks<br /><br /><br />Stan

 

[stant1man]

Re: Merc 115 1974 serial 3272927(no spark!!!)

by the way, is there any other test i can do to confirm that the switchbox is goosed?

 

[phatmanmike]

Re: Merc 115 1974 serial 3272927(no spark!!!)

did you do the test where you bridge the two terminals together on the side of the switch box and place the coil lead about 1/2 inch from a good ground and when you hit the button, it sparks? <br /><br />other than thats thats all i know of other than the ones in your manual....<br /><br />try emailing clams_canino or posting this on his inline 6 newgroup

 

[achris]

Re: Merc 115 1974 serial 3272927(no spark!!!)

Just a quick question Stan. Is there a brown wire on the switchbox on the side with 4 terminals? If so, disconnect it. It's a pulse wire for the tacho, and I have seen one bring a switchbox down. The best place for that wire is on the rectifier, either of the yellow wires.<br /><br />Chris.............

 

[stant1man]

Re: Merc 115 1974 serial 3272927(no spark!!!)

I did do that test Mike and it failed. I then changed the coil and it still failed. Should it spark at the coil lead to ground or from the wire im grounding it with? Not sure about that tacho wire Chris, i'll check. Im waiting on a call from the marina just now to let me know if they have a switch box. Im certain its faulty and for the sake of 20-30 pounds i aint gonna moan.<br /><br />Everything crossed! If it runs i'll let you guys know right away!<br /><br />Stan

 

[phatmanmike]

Re: Merc 115 1974 serial 3272927(no spark!!!)

that test should spark between the HIGH TENSION lead coming from the coil to ground, across a 3/8" gap. <br /><br />if not, its more than likely the switchbox, cause idid it with mine, and it worked...<br /><br />good luck and repost so we can know whats up<br /><br />m ikey

 

[stant1man]

Re: Merc 115 1974 serial 3272927(no spark!!!)

Yep, im 110% in favour of blaming the switch box! Trouble is, the guys at the marina dont have one. I dont know where else to try???

 

[phatmanmike]

Re: Merc 115 1974 serial 3272927(no spark!!!)

http://cgi.ebay.com/ebaymotors/ws/e...tem=2485421067&category=50439&sspagename=WDVW <br /><br />or<br /><br /> http://cgi.ebay.com/ebaymotors/ws/e...tem=2485730343&category=31284&sspagename=WDVW <br /><br />the first one is guaranteed to work by clams_canino ....<br /><br />the second one isnt garaunteed but it comes with coil and selenoid....<br /><br /> http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2485713795&category=31284 <br />this one is just plain cheap!!!

 

[stant1man]

Re: Merc 115 1974 serial 3272927(no spark!!!)

It really is such a shame that none of these ship to the UK otherwise id have em. The guys at the marina have given me a couple of numbers to try so i'll give them a go tomorrow.<br /><br />Thanks<br /><br />Stan

 

[phatmanmike]

Re: Merc 115 1974 serial 3272927(no spark!!!)

Originally posted by phatmanmike:<br /> [<br />if they say they wont ship to the uk, i could pick it up fpr you and shipp it myself. just lemme know. we are all here to help!!!

 

[stant1man]

Re: Merc 115 1974 serial 3272927(no spark!!!)

I know Mike, I havent forgotten your most generous offer but I would hate to have to put you to all that bother when I might be able to get one local. I think everyone on the board will agree that its people like you that really make the boating community!<br /><br />Big shout out to the Phatmanmike for being a first class individual!!!<br /><br />Thanks Mike<br /><br />Stan

 

[achris]

Re: Merc 115 1974 serial 3272927(no spark!!!)

Hip, hip, hurray.