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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    So it's ok to have a little space as shows în the pictures?
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Ok I think they actually work. There is a little space but I think it's normal
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    I have a problem. So the pistons from WSM .020 look a bit different inside. Model number 100-205-05k O called and spoke to Florida tech support and they said this is the model for 1990 Force B model 3.375 opening rebored .020. If you look inside thespacers don't fit anymore. They sent their own...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Yeah I have to order the second one, only have one. I just got done pressing the race pins out of the old pistons good thing I have a friend with a body shop. I used a 20 ton press he keeps unused in the back of the shop, you still had to hold it in a perfect straight position to get it out...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Anybody?
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    https://www.ebay.com/itm/153844333409 816515 Driveshaft Stand Tube The question is where it goes it seems to be a single. Anybody seen this before? If you opened it up it mu
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Ok so I am waiting for the machine shop to do the block reboring. In the meantime I am cleaning and prepping it all. I have a question on a piece that fell in the initially dismantling. I asked this before and still have no clue where it goes. The black plastic piece. The only place that it...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    In the book the spaghetti seal is in the 120HP model A the B and C have the Loctite. I just read that recently in the service manual.
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Ok so for the crank case sealing the 518 is a must. What can I do for places where a gasket is used can I use some silicone whether liquid type or paste type to make sure there is no leak? I am talking really thin amount on the gasket? Even copper spray that some spray head FeltPro gaskets on...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    What do you guys use to clean the crud off the exhaust tube. It is nasty and black. Can I use gas or diesel? I have a parts cleaner with a pump in it that I got recently it is not too big but it should accomodate this size engine. I need to know what to use for the aluminum that won't affect the...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Yeah thanks, I am using the Loctite on the 2 crank case pieces but on the separation plate when opened there was black silicon don't know if original. Everything else had nothing but gaskets. So I don't know much about the 518 or the gel as compatibility with gaskets but permatex I do know. The...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    It only works up to 400F I don't think temps go higher than that right? I wonder if the red permatex for high heat would work around the exhaust gaskets? I am trying to make sure the knicks and scratches don't bleed out air. I always use the black ultra on cars don't see why it won't work here...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    When you say liquid sealer Can I use this one it's used up to 400 degrees, for gas, oil water etc...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    I was reading on it and apparently if and when you get water in the cylinders that could be the culprit. That's why I asked. To me it looks beat as heck. Can you use silicone of some sort on the gaskets of these parts? I would not trust it without.
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    I took all the parts off the engine to clean and when I got to the exhaust cover I noticed the plate behind it was not exactly straight. It has a bulge in the middle that goes on throughout the length of it. Is it mandatory that the plate is flat? I will.show a photo tomorrow.
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Yes sir it is. Just double checking not questioning. So you're saying the Loctite 518 is enough no need for the Crankcase Cover Seal F698122 And the same for the spacer plate at the bottom of engine that had the gasket on top and sealant on the bottom?
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    Crowly Marine diagrams show Crankcase Cover Seal F698122 number 20 in the picture When I opened it up it did show a red sealant like Loctite.
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    I noticed the 2 halves have a groove, this is similar to BMW crank halves there you inject the sealant until it comes out. So I assume the sealant is only put in the groove space right not on the whole edge. Is this the Johnson...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    So I decided to buy 4 new pistons and rings .020 spending 700 bucks to repair this is not a lot. I have a question in the books they mention a sealant as industrial 750 sealant. I don't know if that is available but what have you guys used to seal the crank cases together and the bottom end...
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    1990 Force 120HP #2 Cyl zero compression and upon opening piston shows damage

    I have to get a new piston anyways. If I get 4 it will go up in price. I was gonna get on bore at .010 and the rest just new rings. I measured it 100 times. With the telescopic gauge I got the 3.3782. That's the largest I got the dial gauge was a bit less. It's all up there in the picture of...
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