V6 Modules
 

Here's a question for the TB IV ignition garus out there. I have an idle problem that's been driving me up a wall:crazy:
My 540's will sit there and idle all day at 8/900 rpm when put in gear they want to stall. OK , so I set the idle to 7/800 rpm in gear , shift to neutral and I'm up to 14/1500 rpms:mad:.
I had it suggested to me this afternoon that when idling near 900 the advance may be starting and I'm not at my initial timing setting. So when I put it in gear and it drops some more I may be losing a couple of * of timing causing the engine to slow some more:confused: . I didn't have a change before work to try this theory but it sounds reasonable.
Was talking to Dean Nickerson and he said toss the 330 module for the V6 that should clear it up.
Carbs have been checked , rechecked , adjusted and readjusted and they are fine.

Gotta do some work now but will check back in an hour or so;)
Thanks

It the CRANE boxes you need MSD they have super extreme unreal gosh darn wild terrible mean current to the plugs and the crane well ,, I let my 2 year old hold the plug wires to check for current he smiles when its firing ,,NAAA :p :p :p

the v6 box will help for sure but try locking it at 30* at idle and it will idle better and dock better ect ,,,30 to 32* is all the total you need ,, SMILE ITS CHEAP AND EASY :)

Phew , I knew that was coming:D
Problem is , I don't have Crane boxes. Just plain ole' ordinary vanilla Thunderbolt IV. Mainly because they keep on working.
Because of the idle speed of the engine , I'm getting into the advance curve of the TB and causing the idle to go high when shifting to neutral. When these engines were dynoed they used a locked out GM HEI set at 36* Also we couldn't "put them in gear" at an idle:rolleyes: on the dyno.

i may have a used pair of v-6 modules...i'll have to look for them.

i use one on my 575sc, and it works great to control the idle.

yes its a common problem ,,just lock the timing and enjoy ;) ;)

Hi-perf...You got mail:)

T-bolt IV is a good system. I had a similar problem with my 540. Some of it was a bit too much carb. with the 1050 Dominator. The V-6 module, which gives 14 deg. adv. on a V-6 will give you only around 8-10 deg. when used on a V-8. So, If you want, say 34 deg. final advance, start at about 24 deg. initial. That should boost things considerably at idle but make for hard start cranking when hot. I have found that Merc's 20 deg. HP module works best for me set at 14 deg. initial. I can look up that pt.# if you're interested. --- Jer

Jer,
I'd like to know where the 20*HP mod starts its advance curve. That seem to be my problem. When I set the idle to run ok in gear , when I go to neutral the rpms go up to the 1000 range and I start to get advance and the next thing you know its running 1500/1600 and sometimes 1700 rpms.
What would be nice is 20* advance starting at 1500 rpms;) full by 3000

I'm sure I got that chart in the shop. Will look it up and post for you tomorrow. --- Jer

Thanx;)

Mo
Here is the V-8 HP ignition curve

RPM Adv
750 0
1000 0
1250 0
1500 0
1750 3.5
2000 7
2250 10
2500 13.5
2750 17
3000-5250 20

Hope this helps
Bob

Forgot the part # its
17316A1
Bob

I think my prayers have been answered:rolleyes:
That sounds great!

Mo,
Check out this link. Huge amount of tech info regarding ignition modules and advance curves

http://www.perkomarine.com/bulletins/mc/95/EN_011.PDF

Bob

the pn#17316A1 sounds like a winner. Now does anybody know off hand if thats the "riser mount" type or is it on the dstributor?

Cal,

i did a search for you and this is the picture that is related to that part number. i found it at: http://www.lowerunits.com/precisionparts/263.html

Hey Mo-power did you not say you locked the dist on the dyno ??
don't you have blown 540's
why are you all for installing a module that will not have advance until 1750 ??
We've done not one but hundreds of blower motors with locked advance and it works like a dream ,it starts good idles great and gets great fuel milage ,I don't know why I care but its the cheapest way and best to go ,,why not try it ???Again I don't know why I'm concerned but let me know ,thx

Bobby,
I'm not blown , I suck:o ....Nah , wait a minute...that didn't come out right:o
I need a module that won't do any timing changes till over say 1400/1500 rpm because at my idle speed 800/900 rpm my current module already has some advance and when in gear it drops and looses that advance which lowers the idle even more:(
Now if I had the afore mentioned module I could go in and out of gear in the 800/900/1000 rpm range without the timing changing and exasperating the problem:D

Mark,
thanks, that looks like what I'm after:D

10-4 ,I follow what your up to I thought you were blown and not much static comp,and the lock down is great because it stops the hunting of the advance and other weird problems ,oh well just trying to save some bucks so we can get you 2 MSD's ,,I mean Crane boxes :D :D :D :D

:rolleyes: :rolleyes: I knew that was coming:D :D ;)

Well guys,
Thanks for all your help;) BUT PN#17316A1 is no longer available from Merc:( according to Kenny at lowerunits.com.
Worse yet is no superceded number , it's just flat out NLA as merc codes it:crazy:

Back to the drawing board:rolleyes:

Try ebay. Look under "boat parts" and search for "Thunderbolt". While I've never seen the V8-HP or V8-20R module (both 20* modules) I have seen the others from time to time.

Good luck.

Mo,
I tried the part # at this site and it said it was available for $188. Give it a try but if it doesnt work shoot me an e-mail at [email protected] and I should be able to give you some more leads.
Bob


http://www.mercruiserparts.com/partsByNumber.asp

Bob,
I see what you're saying. I tried calling but it was 7:30 and after hours. I'll try tomorrow and monday too if necesary. I talked to Kenny at lowerunits.com , who's in the same neighborhood with no luck.
Thanks for your assistance it's really appreciated;)

Well, you had so much good input this AM that I didn't think I needed to get back; BUT--My supplier says that he can get me 17316-A1 @ $188 dlr.net. If they are going NLA I'm ordering at least one as a back-up . (that's how much I like the way it works for me) I can order two if you like.??!. --- Jer

Thanks to all the people who helped;)
Got a hold of BAM this morning and they had 2 of the 17316A1's I needed. They're on their way next day air. On line price $188 per.

Thanks again , Cal (mopower)


Another problem solved thanks to OSO:)