firing problem

L

lyn battles

Cadet
Joined
Jul 14, 2009
Messages
20
i recently bought a 86 vip 350 with a cobra drive andhe said the timing was off.but the distributer cannot move it has a vacuum advance and its hitting on the shift bracket on the intake.so cannot rotate any farther. but the back cylinders 357 while its runnin I pull the wires off them and it does not effect the motor with all 3 wires off. it dosnt idle real good but does really good at wot. would timing cause the wires to do this. should I buy a dist.without vacuum advance
 
Bifflefan

Bifflefan

Commander
Joined
May 27, 2009
Messages
2,933
Re: firing problem

You dont have fire on 3 cylinders, so it doesnt do real good on top eather.
Read the trouble shooting in the manual, and read the Adult Only section at the top of this forum.
Follow all the steps one at a time, and you will be running good in no time.
 
FreeBeeTony

FreeBeeTony

Captain
Joined
May 15, 2002
Messages
3,991
Re: firing problem

From what I have learned.........marine engines do not use vacum advance distributors, so it sounds like you have an automotive distributor.

And if you're only firing on 5 cylinders I doubt you are making WOT (under load).

Think you need to look a little closer........
 
Bt Doctur

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,129
Re: firing problem

If a cylinder balance test shows no response then a compression test is needed next. Marine motor do not have vac. advance systems. You most likely have a auto type .
 
L

lyn battles

Cadet
Joined
Jul 14, 2009
Messages
20
Re: firing problem

I will try to post a picture I don't have a comp. im using a cell phone.I think it is a automotive dist. would this cause my problems should I replace with a dist.without vacuum advance?
 
M

meesh

Petty Officer 1st Class
Joined
Aug 24, 2008
Messages
256
Re: firing problem

If you have a vac advance then yes replace it. Someone has put a automotive dist. in it.
 
Bt Doctur

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,129
Re: firing problem

Do you know if the spark plug firing order is correct ?1,8,4,3,6,5,7,2.
Do you have spark coming from the plug wire itself?
Do you have points ?
 
J

jack gardner

Seaman Apprentice
Joined
Aug 4, 2008
Messages
40
Re: firing problem

possibly a vacume leak on intake manifold .but take a compression test if compression good check 4 manifold leak
 
You must log in or register to reply here.
Top