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    Lower Unit Oil Below Impeller Leaks Oil - 97 Yamaha S150TXRV

    I have my 97 Yamaha 150 (S150TXRV) lower end off to change the impeller, and while I was at it I changed the lower unit oil. What came out was very black oil. I pumped full of new oil, then just for kicks I turned the entire lower unit upside-down to see if any oil leaked from the input shaft...
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    1997 2 Stroke 150 (S150TXRV) Power Head Passages Description/Function

    I have been trying to diagnose a cooling problem with my 1997 2 stroke 150 (S150TXRV), and it would greatly help me if I could understand exactly the function of each of the following passages on my powerhead and its mating surface (pictures to be attached):
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    Safe & Effective Chemical Treatment To Unclog 97 Yamaha 150 2-Stroke

    Back in 2006 I personally rebuilt my 1997 Yamaha 150 2-stroke, the first and only engine rebuild I had ever done. The reason for the rebuild was that it had thrown a rod due to bearing failure due to longterm saltwater intrusion in the crankcase due to a hole that developed in the block. I had a...
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    Flushing Confusion Leading To Overheat For 97 2-Stroke Yamaha S150RXRV

    I have owned this motor since 2004, and I personally rebuilt the powerhead in 2006. Since the boat is kept on a lift, I have never been able to reach the bottom to slip on a pair of ear-muffs to flush it; instead, I have been using the hose attachment all these years. After my thermostat...
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    Need To Replace Ignition Key Switch On 97 150 (S150TXRV)

    I need to replace the ignition key switch on my 1997 Yamaha 150 2 stroke (S150TXRV). It is a 6 terminal type: off-run-start with push to choke. I tried to find OEM replacement but could not identify the part number. I tried to figure out what each of the 6 terminals are for, and identified 4...
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    Yami 150 Overheating Above 4200 RPM (S150TXRV - 1997)

    Hello and thank you for reading. Several occasions this weekend I took my boat out, and each time I went above 4200RPM an alarm would sound and revs would be limited. At first it startled me but then I realized it must be overheating. I pulled thermo switches and and checked them for proper...
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    Need Zerk Fitting For My Yamaha Steering

    I accidentally overtightened and subsequently broke off one of the zerk fittings on my steering assembly by the Yamaha motor. I looked through the parts catalogs online but could not find reference to zerk fitting. I went down to my local hardware store and purchased a zerk fitting 1/4in...
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    Purpose Of Exhaust Manifold Water Pressure Valve - 97 Yamaha S150TXRV

    Hello, I discovered the nipple housing of the exhaust manifold water pressure valve has cracked and is in the middle of disintegrating after discovering water was coming out from below the cowling, and the spring is exposed. I have had no problems overheating to my knowledge. I figure I will...
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    Slight Whistle Has Developed At Low RPMs

    I've got a 97 Yami 150 Saltwater Series, carbed. I rebuilt it 150 or so hours ago after a water leak in the block cause a crank bearing to desintegrate (3 years ago). When I did this, I had trouble confirming that my oil injection system was working properly. So I capped the oil injection...
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    Very Loud Engine Operation During 3600-4100 RPM

    My 1997 Yamaha 150 carbed 2 stroke S150TXRV seems to be doing well after the rebuild about 30 hours ago, except for what I am about to describe. There is one issue that makes me nervous, and this was happening before the rebuild too. It has always happened for the two years I have owned the...
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    Yamaha Control Unit Trim Switch

    The trim switch on my Yamaha control unit at the helm started not working on "up" a year ago. A little "exercising" of it caused it to work again for the day. It has gotton worse; now the trim switch doesn't work at all and seems to be lose as if it is ready to fall out of the throttle lever...
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    Hurricane Deck Boats By Godfrey

    Would really like to see a forum for this line. There really aren't any active forums for this boat on the Internet from what I have found.<br /><br />Thank you.
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    Water Cover Apparent Saltwater Leakage

    Post-rebuild of a 1997 Yamaha 150HP Salt Water Series II S150TXRV 2 stroke 6 cylinder powerhead.<br />( Click here to view updated blog with new pictures )<br /><br />Took boat on it's debut fishing trip after the rebuild and it did well (ran about 5 hours). 3 evenings later I pulled the cover...
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    Sheared Flywheel Key / Posssible Timing Issue

    OK guys don't laugh but the other night I mistakenly sheared the flywheel key because I forgot to torque the flywheel nut.<br /><br />My salvage supplier gave me another key, which has a slightly different shape. I installed the flywheel, but noticed some rotary play - about 1/2 of a geartooth...
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    Mechanical Oil Pumping System Problem

    Post-rebuild of a 1997 Yamaha 150HP Salt Water Series II S150TXRV 2 stroke 6 cylinder powerhead.<br />( Click here to view updated blog with new pictures )<br /><br />First I'll point out that since initial start of rebuild, I had premix at 25:1 so no fear of under lubing the eng. <br /><br />I...
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    First Few Startups After Powerhead Rebuild - Unusual Smell

    Post-rebuild of a 1997 Yamaha 150HP Salt Water Series II S150TXRV 2 stroke 6 cylinder powerhead.<br />( Click here to view updated blog with new pictures )<br /><br />Is it normal to smell an unusual burning smell like you smell when you plug in a new soldering iron for the first time?<br /><br...
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    Sensor On Engine

    Post-rebuild of a 1997 Yamaha 150HP Salt Water Series II S150TXRV 2 stroke 6 cylinder powerhead.<br />( Click here to view updated blog with new pictures )<br /><br />Can someone tell me what kind of sensor this is? I believe it is a thermosensor but it is not testing correctly like a...
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    Rectifier/Regulator Output

    Working on 1997 Yamaha 150HP Salt Water Series II S150TXRV 2 stroke 6 cylinder powerhead.<br /><br />Coming out of the rectifier/regulator, among other wires, is a red wire with a 30A fuse and then terminates to nothing. <br /><br />It seems that this wire could go to a secondary battery to...
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    Rebuilt Powerhead Temperature Observations

    Rebuilding 1997 Yamaha 150HP Salt Water Series II S150TXRV 2 stroke 6 cylinder powerhead.<br />( Click here to view updated blog with new pictures )<br /><br />I finally started the rebuilt engine last night and she ran like a beauty. <br /><br />I am a bit paranoid with the paint application I...
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    Flushing Methods - Looking For Ideal Solution

    Rebuilding 1997 Yamaha 150HP 2 stroke Salt Water Series II S150TXRV powerhead.<br />( Click here to view updated blog with new pictures )<br /><br />After disassembling my powerhead, I now realize that flushing by use of the Yamaha hose attachment attached to the midsection, and by not running...
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