Need V8 - 20° ignition modules
02-06-2002, 08:16 AM
#1
Registered
Thread Starter
Join Date: Dec 2000
Location: NW USA
Posts: 797
Likes: 0
Received 0 Likes
on
0 Posts
Need V8 - 20° ignition modules
I'm in need of 2ea V8-20° Thunderbolt ignition modules. I'm looking for used ones at a reasonable price. Any ideas on aftermarket replacement items for these modules would be appreciated also.
[ 02-06-2002: Message edited by: NW_Jim ]
[ 02-06-2002: Message edited by: NW_Jim ]
02-06-2002, 01:48 PM
#3
Registered
Thread Starter
Join Date: Dec 2000
Location: NW USA
Posts: 797
Likes: 0
Received 0 Likes
on
0 Posts
From the information I have, which is a little dated, Merc made (3) different 20 degree modules;
Part #'s;
817509T should be marked V8-20R
805361T5 should be marked V8-20R
17316A1 should be marked V8-HP
817509T and 17316A1 are the 2nd design, which is the plastic module mounted to an aluminum plate.
805361T5 are the 3rd design and are suppose to be the same as 2nd design without the aluminum plate.
The only thing I don't know is if all of these are interchangeable or if they changed the plug-in.
If there is a plug in alternative to the Merc, I would like to know also.
A change over of modules, even if I had to buy new, would still be cheaper than (2) complete MSD ignition systems.
Part #'s;
817509T should be marked V8-20R
805361T5 should be marked V8-20R
17316A1 should be marked V8-HP
817509T and 17316A1 are the 2nd design, which is the plastic module mounted to an aluminum plate.
805361T5 are the 3rd design and are suppose to be the same as 2nd design without the aluminum plate.
The only thing I don't know is if all of these are interchangeable or if they changed the plug-in.
If there is a plug in alternative to the Merc, I would like to know also.
A change over of modules, even if I had to buy new, would still be cheaper than (2) complete MSD ignition systems.
02-06-2002, 02:05 PM
#4
Registered
Join Date: Jan 2001
Location: Holland MI
Posts: 3,140
Likes: 0
Received 0 Likes
on
0 Posts
Yup. The MSD swap is slightly under 800 bucks for twins. I set them up at 17 degrees (crankshaft) advance, all in by 3000 rpm. That leaves me with 15 degrees initial advance and 32 degrees total. I'll check with SuperV on part numbers Friday morning. He's snowmobiling up north and will get home late Thurs. night. P.S. Be sure to check the lower distributor housing for wear between the shaft and the housing.
02-06-2002, 02:45 PM
#5
Charter Member # 1083
Charter MemberJoin Date: Feb 2001
Location: BACK HOME AGAIN IN INDIANA
Posts: 159
Likes: 0
Received 0 Likes
on
0 Posts
Man does that ring a bell..The bushing on my stock T-IV was worn out. The good news is that they are only a 3.00 part.
__________________
If it's not a thunder run.............than you're just burnen fuel!!!
If it's not a thunder run.............than you're just burnen fuel!!!
02-06-2002, 08:29 PM
#10
Registered
Join Date: Jan 2001
Location: Holland MI
Posts: 3,140
Likes: 0
Received 0 Likes
on
0 Posts
I don't know if the bushing deal is common or not. I haven't seen the problem for quite a while but the last two engines I did had both of them wiped out. everything else in the engines, including the cam and distributor gears, looked good. Let me know how yours look.
