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Old 05-27-2014, 05:21 PM   #1
Lt. JG
 
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Default 120 L-Drive Impeller housing question

1990 Force L-drive 120 motor. Is over heating at high rpms. Going to start with impeller and saw that the plastic housing is cracked. Question is....the rebuild kits I find have a white plastic pc included that fits in the hole in the housing beside the drive shaft. When I pulled my lower unit it did not have that pc there. WHAT IS IT AND DO I NEED IT IT!?!? The rebuild kit is for a 85hp-125hp85hp-125hp motor.
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Old 05-27-2014, 05:27 PM   #2
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pictures or diagram?
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Old 05-27-2014, 07:21 PM   #3
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Hey there Mike. I don't think I can post pix yet but I will try and put one in my "albums" folder.
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Old 05-27-2014, 07:29 PM   #4
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The white cylinder pcClick image for larger version

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Old 05-27-2014, 07:31 PM   #5
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This is my current cracked housing Click image for larger version

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Old 05-28-2014, 01:13 AM   #6
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The crack is tight so doubt much water pressure would be lost.

The white sleeve connects the pump output to the water tube in the upper half. Look to see if the old one stayed on the upper tube.
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Old 05-28-2014, 03:43 AM   #7
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Ok. Well I hope between the housing and the impeller it will fix my problem. Is there any sealant or anything I should use when reinstalling the gaskets and the plate?
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Old 05-28-2014, 12:35 PM   #8
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I use mercruiser perfect seal on the gaskets.
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Old 06-16-2014, 10:38 PM   #9
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Ok Mike. I have everything put back together and my propeller is running while I'm in neutral.....
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Old 06-17-2014, 02:38 AM   #10
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I know with Alpha drives the lower must be installed while in forward gear and Bravos are done in neutral.

How did you install yours?
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Old 06-17-2014, 02:47 AM   #11
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Well....I took it apart while in neutral but during more research found that a lot of them have to be in drive like you said. So I put it in drive for the install. Do I need to take it apart in drive and put it back together in neutral?
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Old 06-17-2014, 03:39 AM   #12
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Not 100 percent sure but from what I know outboards are assembled in neutral so to answer your question yes.
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Old 06-17-2014, 10:20 AM   #13
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I will try....and we shall see....
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Old 06-20-2014, 12:42 PM   #14
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Ok....put the boat in drive, disassembled LU, put in neutral and reassembled. Worked!!! Took it on the river last night and ran it for about 30 mins up and down at full throttle.....no overheating! Only issue I found is there seems to be a "sweet" spot witht the throttle. I push it all he way down and it runs about 4500 rpms. I move it up and down and its like it catches and picks up to 5000. Issue with the throttle cable maybe?
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Old 06-20-2014, 01:23 PM   #15
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First glad to hear you got the shifting and heating fixed.

I don't know enough about this engine but I would suspect either cable/linkage issue or possibly dirty carbs. Does this engine have oil injection or do you mix the oil in the gas?
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Old 06-20-2014, 03:28 PM   #16
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Its 2 stroke...mix 50:1.
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Old 06-21-2014, 02:25 AM   #17
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Yep I know it is a two stroke just was not cure if it had oil injection or old style mix in the gas.
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Old 06-21-2014, 03:03 AM   #18
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Oh, sorry. Well thanks for all of your help.
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