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Crusader 8.1 problems

Old 06-12-2019, 07:06 PM
  #21  
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Originally Posted by chuck34 View Post


Ok, my port engine has a water separating Racor filter, that I did replace. My starboard engine, which is running good, I can't find the same kind of Racor anywhere in my engine room. However, there is a Model 110A fuel filter/water separator that is mounted on the engine. It looks to be somewhat smaller than my port Racor. I can't imagine why I would have different filters on my engines. However, there is a chance that there is a 110A filter on the port engine as well, but just getting eyeballs on it is easier said than done.
Any chance that 110A is the fuel control cell you are talking about.
pics would go a long way

FCC is not a screw on filter.
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Old 06-13-2019, 07:01 AM
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Originally Posted by chuck34 View Post
Actually, I'm starting to think I may have some kind of short in my ignition switch.
This. Think electrical
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Old 06-14-2019, 04:06 AM
  #23  
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Originally Posted by Jumpsummo View Post
Here's the good news. You dont need new engines. Find a good mechanic. Bring him lemonade until 5 then bring him beer. It's all gonna work out.
Finding a good mechanic...easier said than done. Anybody worth having is an hour or two away and most have so much local work lined up, they don't need to make a long drive.
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Old 06-14-2019, 05:00 AM
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I'm going to get blasted for this but this is not an outboard. It's a BBC. Ha ha ha Big Block Chevy. They put them in motorhomes and larger trucks. The marine plumbing doesn't change. Fuel, air, spark.

If it has electronic connections it's the same ODBC. Not sure if he needs Merc software to read codes.

Try local mobile mechanics that normally work on trucks. If it's normal engine related stuff he'll be able to solve it. Might like the change. Be up front. "Please take a look. If it's normal engine issue you can solve it. If it's some obscure marine thing you can't solve no harm , no foul."

Might even be cheaper. If it is tip him well.
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Old 06-14-2019, 05:14 AM
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I have no problem with a non- marine mechanic taking a look. Problem is, the guy needs to be a contortionist to be able to work on it and most marine mechanics have learned through experience, tricks of the trade to do certain jobs that a non-marine mechanic would still be scratching his head as to how to get it done.
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Old 06-14-2019, 08:16 AM
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If he can change plugs in anything mounted transverse he can handle it. I'm so glad I don't do either for a living. My buddy has twin 6.2 pocketed inboards on his boat. I can't even get my frame into the bilge which is needed to get to anything. I told him we need to find us one of those little Minions. One or Two eyes. I ain't picky.
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Old 06-14-2019, 03:23 PM
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ding, ding, ding....we have a winner. Solved half my problem. Turns out I did have a bad ignition switch. Engine now turns off when you turn off the ignition.
Engine is still running rough. Definitely not hitting on all 8 cylinders. Will try to do some more trouble shooting while waiting on a mechanic
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Old 06-14-2019, 04:13 PM
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Plugs, Wires. Easiest to get to first. Find one bad plug or wire change all. Cap and Rotor or whatever they use that perform the same function.
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Old 06-14-2019, 06:46 PM
  #29  
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Originally Posted by chuck34 View Post
ding, ding, ding....we have a winner. Solved half my problem. Turns out I did have a bad ignition switch. Engine now turns off when you turn off the ignition.
Engine is still running rough. Definitely not hitting on all 8 cylinders. Will try to do some more trouble shooting while waiting on a mechanic
Did you figure out how the ignition switch was getting power with the battery switch turned Off?
Since you mentioned all that debris along with the water from a to-be-determined source:
I think beside any large primary remote filter/separator most boats have near the tank(s), your Crusaders would have the smaller On-engine Racor filter/water-separator , plus a screen filter at the inlet to the LP pump , plus another screen inside the rail
fuel pressure regulator. I don't think those injectors have filters in them but the pintles could still get clogged open or closed.

You can check parts diagrams and lists for whatever year your 8.1s are , and determine whether yours are "return" fuel system type or "returnless".
Crusader Engines | Classic
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Old 06-14-2019, 07:31 PM
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TTaxi, good question about power when the battery switch was turned off. My only guess, motor was getting its power from the alternator.
I do need to see if my engine has a smaller filter. If it is there, and I think there is one, access will be extremely difficult. Just seeing it will be difficult. I may have to hire some skinny little teenager to drain and/or replace it.
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Old 06-14-2019, 07:40 PM
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Thanks for the parts diagram.
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Old 06-15-2019, 02:31 AM
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Hello, if a lot of water and dirt has gone through and you now have clean tanks and new water separating filters, I would definitely start by checking and changing the spark plugs as necessary. Does she run rough at idle or through the whole rev range? I would also suspect after the racor filter you´ll have an engine mounted filter or maybe two, these should be changed also and then take it from there, if still running rough, would probably go for an injector clean. You could of course before doing any of this get someone with the diagnostic computer to plug it in and check the values against the engine that is running well. I very much doubt a stuck valve, compression test would probably confirm. Hope this helps.
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Old 06-15-2019, 01:34 PM
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Duxa-
I second the suggestion of scanning both engines and comparing values . A scan on MPI engines is always the recommended 1st diagnostic step.
There are a lot of things the scans would not reveal but the great value of such scans is they do immediately rule out a lot of potential suspects to avoid lost time & $. Especially when you have a good engine with which to compare data.
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Old 06-15-2019, 03:00 PM
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Firing order off? Pull one wire at a time out of the cap to find which cylinders aren't pulling their own weight.
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