Thunderbolt IV

[fisheasy]

hello guys first post here.. Had a thunderboltIV question. My ignition module seems to have gone bad. Is there anyway i can do a whole new setup anddo away with the thuderbolt IV ignition. I have looked at the prices of these things and it seems it would be cheaper to get a new distributor. Dont some have the electronic ignition in the distibutor. Thanks for your help and go easy on me i am a noobie

 

[chiefalen]

Re: Thunderbolt IV

Welcome aboard ! Maybe you can give us the year make model s/n of your setup.

Or go to the top of the forum and read the " Adults only "

 

[fisheasy]

Re: Thunderbolt IV

Hello chiefalen.
The wiring system is from 1987 but the motor is from the mid 90's hope this helps. I have looked through the sticky but doesnt say anything about changing out and doing a whole new setup. The Newer boats do not have the ignition coil and all that anymore do they? I am trying to do away with all that if possible

 

[jaxnjil]

Re: Thunderbolt IV

you could look here

http://www.iboats.com/Mercruiser_In...5032643--**********.116034287--view_id.270821

they carry a good supply of igniton parts

 

[Bondo]

Re: Thunderbolt IV

The Newer boats do not have the ignition coil and all that anymore do they? I am trying to do away with all that if possible

Ayuh,...Welcome Aboard,....

Believe it or Not,... Even in this day,+ age,...
A boat motor just will Not run without an Igntion system,+ Coils....

The T-Bolt IV is about the Best, Dependable, cleanest running igntion there is for a Boat....
The current issue T-Bolt V just has a few extra bells,+ whistles, which of course co$t more money...

Up in the Adults Only section at the top of this forum are the factory service manuals,...
Download the 1s you need,+ They'll explain the Testing,+ Service of your T-Bolt IV....

Changin' it Ain't Cheaper, Nor Better......

 

[JustJason]

Re: Thunderbolt IV

You could always change the distributor over to a points system..... but it would probably cost the same amount the do that, that a TB4 module costs.

 

[jaxnjil]

Re: Thunderbolt IV

there is a presidents day sale here on i-boats and you could get $30. off on the promo

 

[fisheasy]

Re: Thunderbolt IV

thanks for all the imput guys... I will look at that points system as you mentioned justjason... I need to do a volt test on the module to see if it is bad but i beleive it is...

 

[JustJason]

Re: Thunderbolt IV

I wouldn't personnally change over to points from a TB4 system. As bondo said it's a pretty solid system. TB4 has been through a couple of revisions and the newest ones are darn near bulletproof.

 

[fisheasy]

Re: Thunderbolt IV

OK thanks i will look into getting a new modular ifmine is bad

 

[dsmmace]

Re: Thunderbolt IV

Can we at least change out our distributor to a aftermarket one for the 4.3's?

 

[mkast]

Re: Thunderbolt IV

Can we at least change out our distributor to a aftermarket one for the 4.3's?

Why?
Do you have money burning a hole in your pocket?
If you are using a Thunderbolt IV system, you won't find a better system, that won't cost you some money.

 

[fisheasy]

Re: Thunderbolt IV

whats 4.3 system

 

[Don S]

Re: Thunderbolt IV

Why are you guys wanting to change ignition systems, what are you expecting to happen? The Thunderbolt 4 and 5 have as high an output voltage as any other system, they are designed to work on the Mercruiser engines, and the have the proper advance characteristics. The advance is also electronic, so you don't have to screw around with weights and springs.
What are you hoping for by changing them?
Oh, and will you know how to wire in your shift interrupt system with a different distributor?

If you guys are thinking you could pull a distributor out of an old junk car for cheap, forget it. First they won't be marine rated which means sparks from inside the distributor could ignite fumes in your engine compartment if there were any, and second, the completly wrong advance setup. for the way a marine engine operates.

 

[fisheasy]

Re: Thunderbolt IV

I am gonna switch my module if it is bad. I didnt know if they had a new ignition system for the mercruiser. I was only going to switch if there was something better but i guess there is not. I thank you for your help

 

[jaxnjil]

Re: Thunderbolt IV

If you guys are thinking you could pull a distributor out of an old junk car for cheap, forget it. First they won't be marine rated which means sparks from inside the distributor could ignite fumes in your engine compartment if there were any, and second, the completly wrong advance setup. for the way a marine engine operates.

 

[fdwengen]

Re: Thunderbolt IV

Where is this "Adults Only" at the top of the forum

Or go to the top of the forum and read the " Adults only "[/QUOTE]