Coil pack 92 nautique, possible symptoms?
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Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=14863
Printed Date: November-17-2024 at 10:37pm
Topic: Coil pack 92 nautique, possible symptoms?
Posted By: jayc
Subject: Coil pack 92 nautique, possible symptoms?
Date Posted: August-10-2009 at 7:08pm
Hi Guys,
I'm troubleshooting a 92 nautique over here in blighty and suspect the coil pack.
cyls 6, 7 and 8 are sparking but it seems they are firing either to early or too late meaning that there is little or no combustion on those cylinders.
Initially I suspected it to be a fuel problem as the boat started playing up after cleaning the spark arrestor (was full of alternator belt shavings). The boat runs on propane (like many do in europe) and often the slightest change in airflow will affect the mixture.
Any how after fully checking the fuel system it is defo the ignition because of the following :
1. Sometimes runs fine, other times it missfires and then surges
2. On pulling leads 6,7 and 8 whilst running there is little chnage in RPM (but good spark from lead to ground).
3. Exhaust manifold on that side is cold, other side is warm so I suspect this means no explosion on those 3 cylinders.
4. Exhaust smells of fuel, particually when running poor.
5. Engine backfires through both the carb and exhaust everynow and then.
Now I've read before that the coil packs on these can be troublesome. Could these be playing up meaning they are not firing at the correct time?
Any ideas?
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1982 Nautique 2001 - 351W Dual Fuel
1982 Ski Tique - 351W Dual fuel
1996 Maxum 210ss -350 EFI Dual Fuel
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Replies:
Posted By: Munday
Date Posted: August-11-2009 at 4:01pm
I fought this battle once on my 92SN.The coil packs fire 2 cylinders at one time.Fires at the top of exhaust also.If coil was the problem the other cylinder common to 6,7,8 probably wouldn't run right either.I would suggest a compression test first off.Hope you don't find what I did.Flat cam.
Munday
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If the only tool you have is a hammer,everything starts to look like a nail.
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Posted By: jayc
Date Posted: August-14-2009 at 7:28pm
Turns out it's water in the bores. Pulled plugs 6 7 and 8 today and they are wet and rusty.
I'm guessing manifold/riser issues causing this.
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1982 Nautique 2001 - 351W Dual Fuel
1982 Ski Tique - 351W Dual fuel
1996 Maxum 210ss -350 EFI Dual Fuel
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Posted By: Munday
Date Posted: August-14-2009 at 7:36pm
That makes sense,hope its just the riser.Either way better any flat cam.
Munday
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If the only tool you have is a hammer,everything starts to look like a nail.
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Posted By: Brady
Date Posted: August-14-2009 at 8:35pm
Jay,
Could be head gasket also
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Charlie
Three Lakes, Wisconsin
69 Barracuda
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Posted By: kapla
Date Posted: August-17-2009 at 1:28am
problem with the protec ign unit (coil pack) is that if its bad you have to change the whole unit..
a retro fit dizzy and coil to eliminate the protec is the final solution...
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<a href="">1992 ski nautique
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