mercruiser 454
#11
Registered
Thread Starter
Join Date: Sep 2013
Location: NORWAY
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
thanks again didn't get anything done today, pouring down outside :/
i do not know what igition system it is but it looks like it is the originale. and on metal thing between the rockers it says "mark v" if that can tell anybody what year or ignition system it is?
Svein
i do not know what igition system it is but it looks like it is the originale. and on metal thing between the rockers it says "mark v" if that can tell anybody what year or ignition system it is?
Svein
#12
Registered
Join Date: Aug 2013
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
find ignition module on the engine and see what is written on it , can be mounted on distributor or port side exhaust elbow
thunderbolt IV is a single module no special procedure for timing
thunderbolt V usualy two modules mounted on distributor , needs purple white wire connected to ground to set timing and carb adjustment
thunderbolt IV is a single module no special procedure for timing
thunderbolt V usualy two modules mounted on distributor , needs purple white wire connected to ground to set timing and carb adjustment
#13
Registered
Join Date: Nov 2001
Location: Pennsylvania
Posts: 3,385
Likes: 0
Received 0 Likes
on
0 Posts
Gen 5 a mid ninties is probably a tbolt 5 ign. The purple/white wire that you need to ground runs between the ig module and knock sensor module and has a pigtail to ground, often with a rubber plug in it that you remove when grounding.
#14
Registered
Thread Starter
Join Date: Sep 2013
Location: NORWAY
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
hi again it is finally sun again and i've don a little on the boat. it is a TBV ignition on it i think, it has the two modules on the distributor.
i pulled the valve cover and all the rockers were tigthend almost all the way in :O when i adjusted them the chugging was gone but i saw that one of the pushrods where sligthly bendt. :/
on full thottle she still backfires but i have not adjusted the timing with the white purple wire grounded yet. i hope i got time for that tomorrow.
any thougts?
best regards.
Svein Rønningen
i pulled the valve cover and all the rockers were tigthend almost all the way in :O when i adjusted them the chugging was gone but i saw that one of the pushrods where sligthly bendt. :/
on full thottle she still backfires but i have not adjusted the timing with the white purple wire grounded yet. i hope i got time for that tomorrow.
any thougts?
best regards.
Svein Rønningen
#16
Registered
Join Date: Oct 2004
Location: medellin colombia, pablo escobar's lil town
Posts: 8,390
Likes: 0
Received 6 Likes
on
4 Posts
that is a heavy boat, but a nice one. spend a few bucks. pull the heads and get a valve job done, install a roller cam, and msd ignition.... they are heavy and need a strong engine to wake em up!
#17
Registered
Thread Starter
Join Date: Sep 2013
Location: NORWAY
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
if it's not helping with an adjust of the timing tomorow is it only cam or coil left that can be wrong? if so what brand type is the one to choose? engine parts are extremely pricy here so i would prefer to have something reliable but not too pricy.
best regards
svein rønningen
best regards
svein rønningen
Last edited by toylux; 09-08-2013 at 02:56 PM. Reason: writing error
#19
Registered
Join Date: Oct 2004
Location: medellin colombia, pablo escobar's lil town
Posts: 8,390
Likes: 0
Received 6 Likes
on
4 Posts
if it's not helping with an adjust of the timing tomorow is it only cam or coil left that can be wrong? if so what brand type is the one to choose? engine parts are extremely pricy here so i would prefer to have something reliable but not too pricy.
best regards
svein rønningen
best regards
svein rønningen