rcollector
Posts: 95
Joined: 12/1/2004
From: , FL, USA
Status: offline
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The owners manual for my O.S. 61 says to use a 60 class deep vee prop. I would imagine a prop for a 60 size engine would be a good starting point for the ys engines. I am sure your four strokes will not be putting out as much power as a modern 2-stroke marine engine of the same size but it will be making all of it's power at a lower rpm so therefore you will need a good sized prop anyway. My os manual says to be careful about overreving , it states that even jumping waves and having the prop come out of the water could damage the engine.
As far a lubricant I have used a 50/50 mixture of 20/50 motor oil and stp oil treatment and had no problems. I have an original bottle of amps oil but I don't know what it really is. It seems to have about the same consistancy as 90 weight gear oil but it is very red in color. I have talked to people that raced amps drives and one guy reccomended using something called lubriplate. He described it as something between greese and oil in thickness. Lubriplate makes so many products I still don't know exacly what product he meant Just remember that Amps drives are only sealed by sealed ball bearing so the lubricant always slowly seeps out . So, the thicker the lubricant ,the better it stays in the drive but you still want to use something thin enough that it will flow all over the gears well.
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All Forums >> RC Boats >> Speed - RC Nitro Boats >> RE: AMPS hulls & outboards pics& tips 
RE: AMPS hulls & outboards pics& tips - 
YES it is all right to post here that is what this form is for ...to help each other out look at all that great info so far...look if you try to Google {AMPS I/H} this is all you get /so i hope all the people that know anything about AMPS post there knowledge here to share with all of us 
