Engine Rebuild Ignition System Help!!!

[chiefalen]

Re: Engine Rebuild Ignition System Help!!!

It's a jet boat cause thats what the ad says.

My boat was a big bargain also 300 bucks at the end it was 3000 and then 400 for another motor 5 years latter.

They are never free or a bargain.

I know you thought you would get instant solutions but they are trying.

These guys say you got a real odd ball, one of a kind sorta thing.

Could this be a reverse rotation POS. Thats why the firing order and wires are all fugazied?

 

[dufferb]

Re: Engine Rebuild Ignition System Help!!!

You guys did catch he wants to start it on the ENGINE STAND, right?

 

[legoman67]

Re: Engine Rebuild Ignition System Help!!!

You guys did catch he wants to start it on the ENGINE STAND, right

as long as the stand is strong there is nothing wrong with starting it on the stand, as long as you have good water flow, and fuel supply.

Also are you sure its not a crusaider? we pulled 2 old 1973 crusaiders from ours, the distributors are at the back and its a GM 307 block. Looks simular to the pic you posted. Also ours were paired with Penta 280's

 

[captmello]

Re: Engine Rebuild Ignition System Help!!!

Also are you sure its not a crusaider? we pulled 2 old 1973 crusaiders from ours, the distributors are at the back and its a GM 307 block. Looks simular to the pic you posted. Also ours were paired with Penta 280's

Nice catch Lego!!

Look... I think we are thinking too hard about this... I am trying to keep it simple... I know there is a simple solution to this issue and I don't know what it is... Hence the reason I came to iboats... I need a simple wiring solution... Like maybe a special distributor without a module or wire diagrams... I don't know... I need help!!!

You can't expect a simple solution to an ignition problem when your not supplying simple Info.

Why don't you buy a new Module? Could perhaps get one used.

Are you sure the distributors in the right way?

Have you posted your project in the building/restoration forum. I'm sure we'd all like to see.

 

[chiefalen]

Re: Engine Rebuild Ignition System Help!!!

Mello good catch, dizzy might be in 180 degrees turned around.

Yea we caught it that he wants to start it on the stand.

No he don't need water going to it if he just runs it a minute or 2 just oil in it.

Anything longer yes then water.

 

[QSS]

Re: Engine Rebuild Ignition System Help!!!

why don,t you try a second hand distributor for a small block chevy from a wreckers or something with breaker points ignition and wire back up that way. would be very easy to do. also very cheap.. you may have to just buy new points and a condensor.

 

[chiefalen]

Re: Engine Rebuild Ignition System Help!!!

In the original post that i read and re-read a few times you say you took it apart and cleaned it up and reinstalled with new gaskets.

If this is correct where did you get the gaskets if you didn't know for sure what motor it is?

And when you took it all apart you didn't make note of the dizzy and how it was set up??

Me thinks we are not getting the whole story here?

How is it thats it's a 70 something motor with a thunderbolt ignition???

Something ain't right ???

I'm tired of chasing my tail around in circles.

 

[Don S]

Re: Engine Rebuild Ignition System Help!!!

I personally never put an engine back in the boat till after I run it. The stand you have it on in your picture will work perfectly. I even hook up water to them and run them for a while to make sure everything works. I also check the timing and adjust carb mixture and make sure everything works.

Its not getting the spark pattern that comes from the coil to distributor...

The coil has nothing to do with the firing order, that is all done by the distribur cap and wires. If it won't start because of the firing order, the first thing I would check was to get #1 cylinder up on TDC on the COMPRESSION stroke and make sure the rotor is actually pointing at #1 plug wire.

 

[Bondo]

Re: Engine Rebuild Ignition System Help!!!

I personally never put an engine back in the boat till after I run it. The stand you have it on in your picture will work perfectly. I even hook up water to them and run them for a while to make sure everything works. I also check the timing and adjust carb mixture and make sure everything works.

Ayuh,.... While you can still get To everything.....

 

[trent39]

Re: Engine Rebuild Ignition System Help!!!

Well well... I once again must thank you all for the input here... I know you guys feel like I have left some details out and really I honestly bought this boat and motor from a really nice old lady... Now I am sure that since you say the Thunderbolt IV was released later than the boat age then it was probably once replaced over a 35 year span... I was also able to figure out what gasket set to purchase due to the casting numbers which lead to a 307... So I think my next step is to try out this points break system... I'm not too familiar with it but I will learn (unless I get some more help from you guys)... I will most definately keep you posted on my project and continue to use iboats

 

[Don S]

Re: Engine Rebuild Ignition System Help!!!

So I think my next step is to try out this points break system... I'm not too familiar with it but I will learn (unless I get some more help from you guys)...

The Mercruiser Thunderbolt IV system is electronic. THERE ARE NO POINTS. no point dwell, no condensers, but it does include a lot of other things.

You really need to post what drive you have, a picture would help if you don't know. I know you think it's a waste of time, but there are things in some drive systems that can cause more problems than you even think possible. It's getting to the point that this is look at as a prank post for the simple fact you won't part with any information. Just more questions and no answers to questions asked of you.

 

[captmello]

Re: Engine Rebuild Ignition System Help!!!

prank post

Had me goin'

 

[dufferb]

Re: Engine Rebuild Ignition System Help!!!

My point was, he couldn't put the dist. in correctly or didn't know how but he's going to be OK running it on an engine stand?? (he didn't say crate) But I agree sounds fake.

 

[trent39]

Re: Engine Rebuild Ignition System Help!!!

How could this be a prank post... I would not even waste my time at all with that kind of stuff... I can give a picture of the drive portion only in the daylight... I worked until sunset today... So that aint happening tonight... I seriously came here for some help and I simply got back and forth replies... The answer I think I was looking for was provided by QSS above...

"why don,t you try a second hand distributor for a small block chevy from a wreckers or something with breaker points ignition and wire back up that way. would be very easy to do. also very cheap.. you may have to just buy new points and a condensor." Thanx QSS

... Anyone who has a goal of building a boat and needing some questions answered should be helpled??? Especially if he joins a group forum for those answers... Take it easy on me guys... I am only 23 and dont have a whole lot of knowledge in mechanical work... But I do have an eagerness to learn and try new things... To all the people who think I am an idiot for trying to get a little dirty... CONGRATS FOR THINKING YOU KNOW EVERYTHING... Because apparently a simple "seaman" knows how to give a peice of simple advice to a "cadet"... I will continue my project and if the boat decides to take a journey to the bottom of the lake then I will learn from it and try again... BIG DEAL... I personally learn from my mistakes... NOT SOMEONE WHO DISCOURAGES!!!

 

[chiefalen]

Re: Engine Rebuild Ignition System Help!!!

Hah did i or did i not sniff out another trickster.

What they get out of it is beyond me, maybe they have been banned under a different name, and this is their way of getting even.

Listen who showed you anything but respect?

Who didn't try to help you??

Everyone racked their brains to help you. People did research spent time to help you.

And guess what the next guy who needs help will get nothing but respect, and advice given freely.

It's what we do here.

YOU POSTED THE BLOCK IS A 72' WITH A THUNDERBOLT IGNITION.

I'm done here maybe some one else can help you.

Good luck !

 

[Don S]

Re: Engine Rebuild Ignition System Help!!!

Hah did i or did i not sniff out another trickster.

NO, you didn't. What would make you think or say something like that?????

The only problem is, he wouldn't give any info. When he does, he can be helped.



Unfortunately, Trent, replacing the complete ignition system is going to cure absolutely nothing, if all you have wrong is the firing order. All you are looking for is an easy button that really doesn't exist.
In your own words, you have spark, just at the wrong time. How will changing to a points distributor change that????????

 

[trent39]

Re: Engine Rebuild Ignition System Help!!!

The firing order is casted into the intake manifold... Its also mounted on the rear end of the block to a stainless steal along with 210 L.H., serial number spark plug gaps, distributor 30? dwell, and a couple other things... Also if you look at the block... Its obviouse which is the first cylinder due to the furthest cylinder forward... I know the plug wires are correct... Its not getting the spark pattern that comes from the coil to distributor... But I tested the coil and its got spark... So I have a feeling this was due to communication between distributor and module... But correct me if I'm wrong... Can't I do away with the module and use a certain distributor that communicates with the coil and causes spark at exact time needed for firing order???

As I stated once before... Its not the firing order... I know for certain I had it correct... I simply was not sparking in a squence pattern... This is due to the module either failing or the wiring not being coerrect... My assumption is its the module being faulty since I have compared the wiring to all the TB IV sytems out there.. Yes I said it once again... ITS A TB IV IGNITION... It is very possible for the previous owner to replace the older system with something better... Which is waht I assumed after yall told me TB IV wasnt released until 80s... Someone just give please give me a great diagram of a breaking points ignition system and what parts I need and I will be out of your hair... It seems like nobody believes a youngster who is giving the full truth... I dont have time to waste playing games... I just want what I came here for and hope to be able to explain it to somebody else in the future with the same problem!!!

 

[QSS]

Re: Engine Rebuild Ignition System Help!!!

this is a tipical breaker points ignition wiring diagram so have a look at this and see if it makes any sense to you trent you may have to blow it up to see... the wire going from the coil to the dizzy is 12 volts to the breaker points. if you are getting an old one from the wreckers try to get a complete one and have a look at the wiring in it for the condensor to points etc it is quite simple. this is all i could find quickly.

 

[Don S]

Re: Engine Rebuild Ignition System Help!!!

Its not the firing order... I know for certain I had it correct... I simply was not sparking in a squence pattern...

Say WHAT ??????????????

What in the heck is the difference between a firing order and a "Sequence Pattern" ?
You may have the plug wires in the right order, but if they don't start from the right place for #1, all the rest will be wrong also.

Your best bet is to PM QSS and find a good auto junk yard and find a points distributor (That should be fun since cars haven't used them since the 70's) that makes him happy. Then stick stick some automotive distributor in your engine only to find you still have a "Sequence Problem" but now have even more problems to deal with.

 

[QSS]

Re: Engine Rebuild Ignition System Help!!!

Say WHAT ??????????????


Your best bet is to PM QSS and find a good auto junk yard and find a points distributor (That should be fun since cars haven't used them since the 70's) that makes him happy. Then stick stick some automotive distributor in your engine only to find you still have a "Sequence Problem" but now have even more problems to deal with.

Ha laugh!!!!! i,m only answering the man,s question about a diagram Don nothing else... why the attack at me??? its not about keeping me happy i don,t really care... i only meant try the second hand dizzy and if it works then thats your problem. i don,t mean fit it permanently. and as for a junk yard i don,t know of any... i just meant go find one from a wrecker as we call them in OZ or maybe a friend.... (as my mother has always told me if you have nothing nice to say to people Zip it!!!)