Dt 140 spark issues

klrbruce

Seaman
Joined
Dec 20, 2009
Messages
57
Hey all I just picked up a 206 key largo with a 2001 suz dt 140 at a repo auction. We had it out on the water 2 weeks ago and it ran great. Went out yesterday and tried to fire it up. The battery had died. I charged the battery and got her to crank over but no start. Checked for spark on cly 1. And had no spark. I will start tracing kill switch etc for problems. My question is that I remember on some older control modules if you tried cranking with a low battery. You would fry the module. Does anyone know if you crank a 2001 suz with low batt will it fry anything? Also any common probs with this ignition, all the research I've done says they are very strong semi trouble free systems. I got a great deal so I'm not opposed to throwing a $1000.00 module at if necessary but will test coils, low oil shutoff etc first. Any help will be greatly appreciated. And yea I've ordered my new manual and am waiting for it to arrive. thanks. Bruce
 

99yam40

Fleet Admiral
Joined
Sep 7, 2008
Messages
9,116
Re: Dt 140 spark issues

Never heard of cranking on a low battery killing anything, but that does not mean much.

Always best to test things before replacing things.
Test all inputs and outputs to see where the problem is
 

klrbruce

Seaman
Joined
Dec 20, 2009
Messages
57
Re: Dt 140 spark issues

Thanks for reply. Going start tracing electrical this afternoon.
 

klrbruce

Seaman
Joined
Dec 20, 2009
Messages
57
Re: Dt 140 spark issues

Well to update things a little. Found a cracked fuse in the harness thought I solved it but still cranks with no spark on any clynders. Kill switch tests out fine. Low oil shut off tests fine, ignition switch ok The only manual I could find quickly was the seloc and the info on the cdu and fuel injected models is lacking. My gut is saying the cdu computer fried but want to confirm before throwing that kind of money at it. Anyone know how to test cdu? I'm stumped as to why it worked fine, parked it now no workie..thanks all for looking.
 

Ldavidgrover

Petty Officer 2nd Class
Joined
Feb 22, 2012
Messages
197
Re: Dt 140 spark issues

Cranking on a low battery will give voltage surge to electronics. The DT motors wont start or run correctly if battery is bad or weak
 
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