Recent content by mnm99

  1. mnm99

    496 has vacuum when removing oil cap?

    Thanks. Well his other engine doesn't pull nearly as much vacuum as this one. Does that mean its bad? I have the same 8.1's in my boat and doesn't pull the vacuum like this one either. There not bad also. You mentioned.. "However, there is a second part of the system where clean fresh air is...
  2. mnm99

    496 has vacuum when removing oil cap?

    Yes it happens when its running. When it's shut down and sits for a little it doesn't have the vacuum at the cap anymore. I went down yesterday and it's pretty bad. At a idle I can feel with my hand the vacuum pulling in the oil cap!. My friend said he installed that little muffler in the TB a...
  3. mnm99

    496 has vacuum when removing oil cap?

    PCV nipple is under the intake. Hoping it’s clogged if we take it off. There no check valves on this engine.
  4. mnm99

    496 has vacuum when removing oil cap?

    Hey guys, A friend of mine has a 496 and when he removes the oil cap he gets a large woosh of vacuum. Researching it looks like the PCV system is the problem. The PCV is built into the intake manifold. Does this sound like it would be the problem? Wondering if any of you had this problem and...
  5. mnm99

    Tom, I'm going to hold off till the winter I think, couple months. Not sure what I want to do...

    Tom, I'm going to hold off till the winter I think, couple months. Not sure what I want to do right now. Also the wife is giving me a hard time..LOL she likes the panel we have now. I was thinking of the flounder P one. I'll get back to you if your interested this winter. Marc
  6. mnm99

    EIM switch panels. 340 Sundancer

    I'm going to hold off till the winter I think, couple months. Not sure what I want to do right now. Thanks
  7. mnm99

    Is this a Sierra Filter?

    From the place I bought them from. Thanks all. FYI Hello Dometic Corp. purchased Sierra a few years ago and have been making changes. I’m thinking the name Sierra will be gone soon and replaced by Dometic brand, same product just a different name. Thanks
  8. mnm99

    Is this a Sierra Filter?

    Gasoline Engine Oil Filter | Sierra 18-7876-1 SKU: SIERRA-18-7876-1 2 $16.54 I only spent like $8 each. Just emailed them to ask also for the heck of it. I'll see if they know about the Dometic merge.
  9. mnm99

    Is this a Sierra Filter?

    Thank you
  10. mnm99

    Is this a Sierra Filter?

    Just wondering. I ordered my Oil filters and water ones. The Sierra logo is different. Maybe Sierra changed it or something or it's a knock off filter. Look at the A on it and also all Sierra Filters have a boat logo above the name on the filter. This one doesn't. I'm thinking of calling the...
  11. mnm99

    Rpm will not get to max

    Do a compression check, Check fuel pressure
  12. mnm99

    EIM switch panels. 340 Sundancer

    Hey guys. Both panels work fine. I’m seeing if there’s any interest that someone needs these. Looking to upgrade my system, but don’t want to sell unless I can sell these. Won’t be able to ship until I get the new system if so. Looking for $1600 for both.
  13. mnm99

    8.1 Engine problem? Just shuts down.. Mechanics question

    Got it. It was a loose connector on the ECU. All good now. Edit. Just to be clear, We think the cam sensor fixed the problem. The loose connection was a different issue. With all the work troubleshooting on the engine S*** just happens. Glad it was a easy fix for that one.
  14. mnm99

    8.1 Engine problem? Just shuts down.. Mechanics question

    Update. Swapped cam sensor and thought all was good. 2 days all was fine then all of a sudden shut down again. Now it will crank with not starting. Also when you put the key to acc there is no dash beeping and the low pressure pump wont cycle. Swapped the relays and nothing, Connected a new pump...
  15. mnm99

    Night Vision..

    yea post back with pictures also
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