G9 IGNITOR PROBLEMS - spark

MARKUS · 03-08-2010, 11:50 AM

I have a G9 1992 Yamaha golf car that will rev up and start to cut the spark to the spark plug,this I cheched with a timming light and the spark wil stop and as the motor loses revs the spark will come back.The next I did was to rev it up till the spark is gone then back the throttel of and the spark will stay there for ever.

Do these ignitors have a build in rev limiter in them? Sorry my rev counter will or can not read the revs so I can not get the point were this is starting to cut the spark,will sort it out tommorow.

What is the max revs for these motors?

I have also cleaned all connectors to the ignitor.

Any help will help

Thanks
Markus

spriddle · 03-08-2010, 12:02 PM

Sounds like a rev limiter on a G2.

lady bug · 03-08-2010, 07:23 PM

sounds like you are having the same issue as me i have a tiny tach mine seems to happen around 4200 rpm and will bounce between 4200 and 3900 or so the tach has a slow update

yamahag9er · 03-08-2010, 08:18 PM

Some of those carts do have rev limiters on them like Spriddle said. I didn't think that a 1992 G9 came with one, but I could be wrong. Thought it was only on the older G2's.

smallblock450sl · 03-08-2010, 08:27 PM

I know you guy's think I'm crazy......But I will say it again, If you have a "worn/exploded" primary clutch weight, it will give you the same effect. Does the engine "osolate" in the higher rpm range, like cutting in and out?

MARKUS · 03-09-2010, 12:58 AM

Thanks for all the replies first of all

Smallblock the engine is "osolating" at high rpm but the spark is also going dead at that high rpm I will check the primery clutch weights today.

Will get new battries this morning for my rev counter and check the rpm to see if they are around 4200

So it can be safe to say that if this motor is reving 4200 it is a rev limiter on the car.

How can I check if it is not a G2 car

Thanks
Markus

MARKUS · 03-09-2010, 01:20 AM

Ok I have checked the rev and it happens at around 4432 rpm........so this must be a rev limiter comming into play

I will go and check the primery clutch weights now

Markus

MARKUS · 03-09-2010, 01:49 AM

Smallblock you not crazy it is one primary clutch weightight that is broken......thanks for the advice

Now the next question is will you replace all 3 or only the broken one?

markus

lady bug · 03-09-2010, 05:11 AM

wow i am going to have to check my primary also but i have been in there numerous times and never seen any thing out of the ordinary. is there any spacial way to check these like pull on the wights or something. something that might help me find a problem

sabercat · 03-09-2010, 06:33 PM

the g2 has the rev limiter built into the ignition, and has alum trim on the hood down to the floor. the g9/g2 (almost identical engines) motor red line is 5500 rpm but for the g2 the internal rev limiter will kick in befor that but i don't know exactly at what rpm.

so if its not the primary weights, it might be the rev limiter.

03-08-2010, 11:50 AM	#1
MARKUS Not Yet Wild Join Date: Feb 2009 Location: Potchefstroom South Africa Posts: 13	G9 IGNITOR PROBLEMS - spark I have a G9 1992 Yamaha golf car that will rev up and start to cut the spark to the spark plug,this I cheched with a timming light and the spark wil stop and as the motor loses revs the spark will come back.The next I did was to rev it up till the spark is gone then back the throttel of and the spark will stay there for ever. Do these ignitors have a build in rev limiter in them? Sorry my rev counter will or can not read the revs so I can not get the point were this is starting to cut the spark,will sort it out tommorow. What is the max revs for these motors? I have also cleaned all connectors to the ignitor. Any help will help Thanks Markus

03-08-2010, 12:02 PM	#2
spriddle Admin Join Date: Dec 2006 Location: TN Posts: 101,858	Re: G9 IGNITOR PROBLEMS - spark Sounds like a rev limiter on a G2.

03-08-2010, 07:23 PM	#3
lady bug Gone Wild Join Date: Nov 2009 Location: mi Posts: 766	Re: G9 IGNITOR PROBLEMS - spark sounds like you are having the same issue as me i have a tiny tach mine seems to happen around 4200 rpm and will bounce between 4200 and 3900 or so the tach has a slow update

03-08-2010, 08:18 PM	#4
yamahag9er Fry's Golf Carts Join Date: Dec 2006 Location: Central Michigan Posts: 857	Re: G9 IGNITOR PROBLEMS - spark Some of those carts do have rev limiters on them like Spriddle said. I didn't think that a 1992 G9 came with one, but I could be wrong. Thought it was only on the older G2's.

03-08-2010, 08:27 PM	#5
smallblock450sl Sometime's............ Join Date: Oct 2007 Location: Tacoma Washington Posts: 11,874	Re: G9 IGNITOR PROBLEMS - spark I know you guy's think I'm crazy......But I will say it again, If you have a "worn/exploded" primary clutch weight, it will give you the same effect. Does the engine "osolate" in the higher rpm range, like cutting in and out?

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

03-09-2010, 12:58 AM	#6
MARKUS Not Yet Wild Join Date: Feb 2009 Location: Potchefstroom South Africa Posts: 13	Re: G9 IGNITOR PROBLEMS - spark Thanks for all the replies first of all Smallblock the engine is "osolating" at high rpm but the spark is also going dead at that high rpm I will check the primery clutch weights today. Will get new battries this morning for my rev counter and check the rpm to see if they are around 4200 So it can be safe to say that if this motor is reving 4200 it is a rev limiter on the car. How can I check if it is not a G2 car Thanks Markus

03-09-2010, 01:20 AM	#7
MARKUS Not Yet Wild Join Date: Feb 2009 Location: Potchefstroom South Africa Posts: 13	Re: G9 IGNITOR PROBLEMS - spark Ok I have checked the rev and it happens at around 4432 rpm........so this must be a rev limiter comming into play I will go and check the primery clutch weights now Markus

03-09-2010, 01:49 AM	#8
MARKUS Not Yet Wild Join Date: Feb 2009 Location: Potchefstroom South Africa Posts: 13	Re: G9 IGNITOR PROBLEMS - spark Smallblock you not crazy it is one primary clutch weightight that is broken......thanks for the advice Now the next question is will you replace all 3 or only the broken one? markus

03-09-2010, 05:11 AM	#9
lady bug Gone Wild Join Date: Nov 2009 Location: mi Posts: 766	Re: G9 IGNITOR PROBLEMS - spark wow i am going to have to check my primary also but i have been in there numerous times and never seen any thing out of the ordinary. is there any spacial way to check these like pull on the wights or something. something that might help me find a problem

03-09-2010, 06:33 PM	#10
sabercat gone yamaha! Join Date: Sep 2008 Location: ontario, canada Posts: 1,424	Re: G9 IGNITOR PROBLEMS - spark the g2 has the rev limiter built into the ignition, and has alum trim on the hood down to the floor. the g9/g2 (almost identical engines) motor red line is 5500 rpm but for the g2 the internal rev limiter will kick in befor that but i don't know exactly at what rpm. so if its not the primary weights, it might be the rev limiter.

Similar Threads
Thread	Forum
1980 ezgo gas SPARK/NO SPARK	Gas EZGO
Used Ignitor	Gas EZGO
Ignitor	Gas EZGO
wtb ignitor	Golf Carts and Parts
Looking for a Ignitor 85 EZ-Go Gas	Golf Carts and Parts