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We have a 2000, F115 Yamaha, it's really been trouble free, other than a clogged injector, it has just started making a high pitch whine noise when running at around 1800 rpm and above. Does anyone have any idea what might be causing this? 
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2000 model F115, 2000 model 238 Semi-V Carolina Skiff......Fish On..... -
Drive shaft bushing?
mine made a "squealing" sound -
Is it more of a whistling (air) noise? Does it do it out of gear, too? If so, maybe it's something to do with the intake (dirty, or something out of place)? I don't really know, but those are just a few thoughts going through my head.2000 Yamaha OX66 250HP SX250TXRY 61AX103847T
1982 Grady Weekender/Offshore (removed stern drive & modded to be an OB)Comment
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+1^^^^^ re Fairdeal
My F150 mid bushing / drive shaft did the EXACT same thing. Same RPM's, sounded like birds squeaking/chirping nearby. Very annoying...
The lower unit needs to be dropped, Yamaha's WATERPROOF grease applied to the shaft (the machined part) and splines.
Automotive grease will NOT HOLD UP and wash out (don't ask).Scott
1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXRComment
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F115 High Pitch Noise
What's involved in dropping the lower unit? I'm a mechanic but not a marine mechanic, I've never dropped a Yamaha lower unit. Thanks for the info!!Originally posted by TownsendsFJR1300 View Post2000 model F115, 2000 model 238 Semi-V Carolina Skiff......Fish On.....Comment
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F115 High Pitch Noise
It's not a whistle noise, more of a squeal. Thanks for the info!!Originally posted by DennisG01 View Post2000 model F115, 2000 model 238 Semi-V Carolina Skiff......Fish On.....Comment
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Here's the parts fisch for your engine;
http://www.boats.net/parts/search/Ya...115/parts.html
You'll see numerous bolts on the outside of the LU. There's also one under the trim tab. (bolts 8 and #6) Those need to come out. They'll be a water tube hanging down, don't disturb it.
You also may have a piece of hose for the speedometer that gets disconnected.
I don't know if there's a separate linkage for the shifter. The newer models have a splined shaft so there's nothing to do there. It likely needs to be in neutral pulling apart/re-assembling( not positive on your model)
The LU will drop out then.
The long drive shaft will have a machined surface approx halfways up. Clean and re-grease with Yamaha's WATERPROOF GREASE. (DO NOT USE MARINE WHEEL BEARING GREASE, etc. IT'LL BE SQUEAKING WITHIN A MONTH OR TWO).
While your there, if you don't know the age of the water pump, I'd replace it. Might take 45 minutes going slow. Get the kit, not individual parts.. Re-grease the splines too when re-assembling..
PM sent...Last edited by TownsendsFJR1300; 11-13-2015, 07:39 AM.Scott
1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXRComment
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Sure. Hope you get it figured out!Originally posted by Papajohn View Post2000 Yamaha OX66 250HP SX250TXRY 61AX103847T
1982 Grady Weekender/Offshore (removed stern drive & modded to be an OB)Comment
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Please post backLast edited by TownsendsFJR1300; 11-15-2015, 09:10 AM.Scott
1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXRComment
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Any updates?Scott
1997 Angler 204, Center Console powered by a 2006 Yamaha F150TXRComment
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