Lookit what I found!!!!!!!!!

[gcarter]

On eBay!!!!
It's a dual Mercruiser Thunderbolt IV ignition assembly, complete w/two modules, two coils, selector switches, and all mounted on a nice SST bracket.
It's doubtful I'll use it as is, but it's a great source for components I'd use anyway.
Coupl'a questions.......
The modules are marked V8-HP. I'm wondering if anyone here knows what the advance is?
Does anyone know what the little round thingie is off on the side just under one of the coils is? It's marked "195".
It was really inexpensive, and hopefully useable.
It supposedly came out of a Seal boat, maybe one of the Donzi-Halter boats built for the Navy??????
Anyway, here's some pictures.
Any input would be appreciated.

[fogducker III]

Nice find George, that is very well put together and definatly looks "navy" type built..........could the round "thingy" be an alarm of some sort? Looks like the warning alarm up under my dash...?

[Forrest]

The "round thingy" looks like a bridge rectifier like that used on an outboard motor.

Was the power for this unit provided directly from stator windings? The military does stuff a lot differently than its civialian counterpart.

[gcarter]

The "round thingy" looks like a bridge rectifier like that used on an outboard motor.

Was the power for this unit provided directly from stator windings? The military does stuff a lot differently than its civialian counterpart.

Good question Forrest, and I don't know the answer. In fact the engines were missing from the boat when the seller aquired it.

[mrfixxall]

George their 20* timing,full advance @ 3000 rpm to 5250 rpm.. some didn't have a rev limiter.

the little round thing is a tach isolator..

[gcarter]

Thanks Mike.

[seano]

looks like a redundant system to me. one system fails, switch over to to the backup - a la NASCAR

[BUIZILLA]

pretty cool..

[gcarter]

Yep, like NASCAR.
Also, the selector switches are trip proof, you have to pull the lever out a fraction of an inch to throw it.
It's almost a shame I don't have room to use it like it is.
It would be a conversation starter.

[BUIZILLA]

whats the other side look like?

[gcarter]

I don't have time to take another picture now, but all the studs you see are bolts installed from the back side and welded into place.
It's stout!
It weighs 12#.

[mrfixxall]

whats the other side look like?

looks like this jim..

[gcarter]

looks like this jim..

That's it.

[Pismo]

looks like this jim..

The plot thickens...Do tell...

[gcarter]

Someone posted this on another forum;