1977 175 mercury stator problem

[Virago85]

ser 04301235 my problem is when I am at ideal the moter idles rough at wot its fine I talked to a mecanic and he sad check stator so i did and this is what I come up with between <br /><br />blue& red lead rx1000 should=4.5-6.2 i get 6.0 good<br />blue/whit & red/whit rx1000 should=5.4-6.2 I get5.0?<br />red lead & ground rx1 should=125-175 I get 142 good<br />red/whit & ground rx1 should=125-175 Iget 142 good <br /><br />My ? is the blue/white my low rpm do I need to replace my stator and do you think this will fix my low rpm idle Thanks in advance

 

[Virago85]

Re: 1977 175 mercury stator problem

come on guys

 

[KCLOST]

Re: 1977 175 mercury stator problem

Don't trust your ohm readings just yet....There is a low speed and a high speed winding on the stator. But you really need to see what is happeing at the plugs first.<br /><br />I would test the spark on all the cylinders at idle or just when cranking the motor. Do you have a spark tester? You can get one of those in-line types where one end connects to the plug lead and the other to engine ground. You can adjust the gap setting, start out around 3/16"-1/4". Check each one, If you have one or two or even 3 cylinders without spark it could be a switchbox, if one entire bank has a weaker spark than the other, that most likely is a stator problem.<br /><br />When I ohmed my stator, every reading was off, but it seems to be working properly, my problem was a bad switchbox...<br />My ohm readings were as followed...<br />I got, in the same order... <br />= 31.35 x1000<br />= 3.92 x1000<br />= 67.7 x1<br />= 69 x1<br /><br />Had no spark on 1,3&5, replaced the switchbox(s) and everything is back to normal. I still can't understand the ohm readings, though...<br /><br />Let us know...

 

[Virago85]

Re: 1977 175 mercury stator problem

Im gona be honest I have checked the spark and it seems week on all but 1 it will jump fire out of coil the rest you have to hold a screw driver in the coil and hold it close to block I was missing fire on # 4 but while crancking but I started the moter and it started firing and know it will fire while cranking but it looks week will a stator give you week fire on all but 1 coil are does this sound like a switch box problem <br /><br />ps at first I only had fire on 1 coil so I switched the two aroung and then I had fire on all but one know its on all but week <br /><br />Thanks in advance

 

[KCLOST]

Re: 1977 175 mercury stator problem

I'm trying to follow you with your description... First off, you should'nt test the fire by using your method, if you don't have the leads totally grounded, and it can't make the jump you could damage the switchboxes. You want to start with a small gap first!<br /><br />I would recommend that you purchase an in-line spark tester like I mentioned and thoroughly test all cylinders.... Start with 1/8" (less than I previously mentioned)<br /><br />It doesn't make sense that you would have weak spark on all but one cylinder, 3 of them being weak on the same bank is almost always a bad stator. Switchbox problems usually indicate no spark symptoms (do you have one or two of them)? You should have two....However, it's good that you have spark on all! Based on your symptoms, I'd have to agree that it's a stator... But don't hold me to it, test the sparks thoroughly and let us know what happens... <br /><br />You can also ohm test the trigger leads connected to the sides of the switchboxes just as easily as you did with the stator wires... If you have a manual (seloc) it will show you how. If not, let me know, I'll try to work you through it (I doubt that's your problem though).

 

[Virago85]

Re: 1977 175 mercury stator problem

Yes I have a seloc manual Thanks though i just replaced the triger thinking that would fix it I was told that that would make it lose fire on one now on a spark tester that will just tell me if I have spark? are can I determine if it's week as well sorry for all the ? but Ive went through this for the last 2 year at first thay say switch box so I told them to put it on didnt fix then they say float needle seats so put them in so know Im thinking it may have been stator the whole time so I ask around and so far every one says .4 ohms wont make a diffrence but I know that when the #4 wasnt firing I increced speed to 1500 rpm in the water and then it started firing when I droped back it stoped then this morning at first no fire then after i cranked it and let it run it started working I wot it is great but it will no run through a no wake zone when you pull back to Idle in drive are neutral it stalles any help would be great sorry for long wind

 

[KCLOST]

Re: 1977 175 mercury stator problem

Do you have one switchbox or two? Is this a v6 motor? If you have two one will be on top of the other. <br /><br />I'm almost positive you have two of them... Assuming you do, look at the top of each switchbox. There are four wires connected to each (at the top). The outer box has a red-white and a blue-white wire. The inner box has a red and a blue wire. Switch the red-white wire to where the red wire is and do the same with the blue-white and blue. You are basically switching the stator leads from one switchbox to the other. After that, crank the motor and see if the #4 cylinder regains spark, and check all the others as well (especially #3, see if it looses spark). <br /><br />This is a good way to test the stator, boxes and confirm the coils are working. <br /><br />If nothing changes, the outer switchbox could be your problem or the #4 coil is bad. If #4 regains spark and #3 looses it, It could be the stator. Let us know.<br /><br />FYI, based on your serial#, you may own the first V6 175 Mercury ever sold... (possibly)

 

[Virago85]

Re: 1977 175 mercury stator problem

yes I do have two switch boxs I have fire on all coils but it looks week while turning moter over I had lost fire on 1 but then got it back not shure how but its back but it idels rough and cuts off goning through no wake ive changed the fuel pump overhauled carbs and still wont idle dont no kind of leaning to the stator

 

[KCLOST]

Re: 1977 175 mercury stator problem

Are all the sparks weak, or just on one side?

 

[Virago85]

Re: 1977 175 mercury stator problem

they all look week but one

 

[KCLOST]

Re: 1977 175 mercury stator problem

How far of a gap can the spark jump?

 

[dilligafda]

Re: 1977 175 mercury stator problem

Hey Virago, follow KC's directions, he just got a pretty good education regarding ohm readings and stators! <br /><br />Is your handle chosen because of a motorcycle?

 

[Virago85]

Re: 1977 175 mercury stator problem

one inch

 

[KCLOST]

Re: 1977 175 mercury stator problem

That's a really good gap.... If they are all 1 inch you are in good shape... You don't have a week spark problem....<br /><br />If you loose the spark on that one cylinder again, I would suggest switching the stator leads that go to the switchboxes from one to the other... If the no-spark condition moves from #4 to another cylinder (probably #3) it's your stator. If it doesn't move it's the switchbox causing the problem...

 

[Virago85]

Re: 1977 175 mercury stator problem

Hey Virago, follow KC's directions, he just got a pretty good education regarding ohm readings and stators!<br /><br />Is your handle chosen because of a motorcycle?<br /><br />Yes it is!<br /><br />Well set the timing on boat per instructions fired it up and it ideled great the only problem is its idling to high it ideals at about 1000 rpm the carbs have no ideal ajustment its all fixed the only way to adjust the idling is to the set idling screw well that will move my timing i tryed it anyway and the lowest it will go is about 950 rpm then my triger binds I dont know may be a bad tach<br />the tech is set to 4 p and its hooked to the yellow lead coming from stator

 

[Virago85]

Re: 1977 175 mercury stator problem

Took boat out today and I think I need a tech boat ran great but at wot it was teching about 8500 rpm and climbing run it for an hour I believe if the tech was right I would have been geting towed back in what do you guys think

 

[KCLOST]

Re: 1977 175 mercury stator problem

8500??????<br /><br />I'd get the tach checked/replaced....

 

[Virago85]

Re: 1977 175 mercury stator problem

ya that was with the tech set at 4 pulse if i take the plugs out and turn the moter over the tech reads 1000 rpm at cranking speed I set tech to 6 pulse and cranking speeds is about 800 rpm crank moter and it techs about 850 on 6 pulse

 

[KCLOST]

Re: 1977 175 mercury stator problem

Good to go.....<br /><br />I run about 800-900 rpms on the muffs at idle speed, running with the plugs in...

 

[Virago85]

Re: 1977 175 mercury stator problem

let me ask you this My motor runs at about 130 degrease thru a no wake and about 100 at wot it does not pee thru pee whole when idleing but it will at about 2000 rpm i was told this was normal what do you think ? also there is no water coming from the excaust port but from hub is this normal