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    What year 225 ?

    Can you tell the year of this 225 4 stroke from this serial # ? YAMAHA LF225TXR 69K X 1 1008615
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    Cool Fuel Pump Pressure Regulator

    Just removed this " @#@$#$%&Y$%? thing " from the lowest part of the bilge. Think little to no visibility while being a contortionist, and making 25 tiny turns to with finger tips x 2. Ugh. Need a beer.... A few questions: I'd like to test the fuel pressure regulator's function while...
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    Dry Fit Exhaust Elbow - OEM or Aftermarket ?

    Need to replace these on 5.7L 350/ 300hp closed cooling system (Horizon) A few questions: Is there a difference in quality between OEM and aftermarket with these ? If not, which aftermarket is recommended ? Seems like there's only one part #, are they interchangeable for either side of...
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    Older engine, Low hours - Concerns ?

    Hi. A friend of a friend is selling an early 2000's 5.7L 350 freshwater run, closed system, freshwater cooled engine that has very low hours. It's been properly stored and winterized each season. Should I have any reservations/ concerns about the marinization parts of this set up or anything...
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    5.7L 350 - 2003 - MAP/ MPI Horizon - Water Distribution Housing ISSUE

    Weather dipping to below freezing tonight - went to pump air into the air actuated system to pump raw water out of engine ( tonight ) and after just (2) pumps with the air pump, a big spring popped up at me ( normally, pressurized raw water water would come out of the bottom of the housing ). I...
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    Throttle Position Sensor - Compatibility ?

    Looking to replace my TPS on my 2003 5.7L 350 Horizon MAG/MPI Will this AC Delco part: ACDELCO 213912 work as a replacement for the Mercruiser part ? 8M0097035 - Throttle Position Sensor ​ Thank you.
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    DF 2.5 remove tilt preventer

    I have a 2013 Suzuki 2.5 for a small sailboat. Can't tilt the engine up due to the plastic bracket stopper ( the preventer that does not allow you to tilt motor unless it is facing aft ) The motor bracket mounted to the boat is low so when engine is turned off and I want to tilt her, the...
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    1989 90HP V4 dies at 2500rpm

    My buddy has an ‘89 90HP V4 that runs (ran) like a top. Was winterized in fall. This spring, was stalling - ignition wire was cut, probably running on 3 cylinders. Installed new ignition wires. Starts great. Idles great. Runs to 2500 rpm’s fine. Then dies. Checked spark at each plug...
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    MERCATHODE - Bravo3 wires jammed

    Been helping a buddy, a new mercruiser owner, get acquainted with his older engines and drives. One of his Bravo 3’s had a cruddy looking mercathode - when he pulled it, the wires were corroded and severed at the hydraulic ram manifold ( where it feeds up into the transom mount and into the...
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    power trim solenoid replacement ?

    Hey guys. Helping a buddy fix his power trim onm his mercruiser 5.7 L Bravo 3 - his solenoids are shot. The part looks like a 89-807377T - is this a unique part or will any similar looking solenoid for a power trim work fine ? Thx...
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    2003 Bravo 3 - Shifter O-ring to Gimbal housing not there ?!

    First, Happy Holidays. I just pulled drive off to see that there was no O-ring to prevent water into the shifter ( both on the drive and the shifter cable/ boot side ). I'd love to say this was not my fault - but, no one works on this but me and, I've had this package since new - and...
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    2003 5.7L 350 MAG MPI - Set Timing - Adjust Distributor

    Geez - I own the Mercruiser Shop Manual for my engine. I cannot for the life of me find anything on timing the engine ( namingly adjusting the distributor ). I do not own any specialty tools. I'm hoping I can do this with just auto timing and tach tools. If not, let me know. I do believe...
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    Winterize 5.7L MPI Raw Water cooled

    Helping a buddy winterize his 2002 and 2018 5.7L 350 MPI, raw water cooled engines. I have fresh water and I know it's a different process. (2) questions: After getting to operating temp, removing the thermostat, reinstalling housing, less the thermostat, run engine while running antifreeze...
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    72' 6 HP Yachtwin - cooling system ?

    I've had this old girl for about 18 years - built like a tank. I just rebuilt the water pump housing earlier in the season. When I winterize her, I use Mickey Mouse ears and that used to draw up into cooling system and cool the engine with 'tell tales' of water coming from exhaust and the 6-8...
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    2003 - 5.7L 350 - 300HP, Horizon MAG MPI - SUDDEN STALL ...

    Arrrghhhhh. 1000 Hours. Engine has run great - until today. Went fishing for a few hours - boat started each time great. Engine got lower unit oil on it ( cap not tightened right ) so I decided to degrease the engine. Degreased and washed her. Rinsed it. Started her right up. Ran great...
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    2003 350 5.7 MAG MPI Freshwater cooled - Manifolds

    I have a 1000 hours on my original, freshwater manifolds ( only raw water parts are the elbows which I replaced already ). No issues - I'm just a preventive maintenance guy. Should these manifolds be replaced or pulled off and inspected ? Thx
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    1972 4 HP R/R Drive shaft oil seal ?

    Replacing water pump on this old girl and while I'm here, I'd like to replace the drive shaft seal ( not the prop shaft on this project ). Not a lot of info online as to the 'tricks of the trade' for this particular motor. Without a specialized puller, what is the best method to remove the...
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    Decarbonizing 5.7L 350, 300 HP

    My engine has 1000 hours and runs great. I subscribe to preventive maintenance when I have that luxury :) Is there a way to effectively decarbonize the engine - top and lower ? I have heard about using small amounts of water in the intake ( not sure where that would be introduced to the...
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    Mercruiser oil reservoir - A Good Maintenance Idea

    2003 - 5.7L 350/300HP with Bravo 3 - 1000 hours. I do my own maintenance. It's been a good experience and I do not think a yard would give 'the love' I do. Sometimes it comes back to bite me in the *ss, but live and learn ( like NOT knowing to torque my gimbal ring to shaft nuts each season -...
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    8m0054588

    2003 ~ 350/300 5.7L Mag MPI Horizon with 1000 hours: Mercruiser Ignition looks like hell, the heat disipating portion is real rusty ( its mounted near the I/O motor box 'seam' and it's gotten wet over the years from heavy rain ). It works, but I'd rather replace it now than later. QUESTION...
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