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  1. M

    Yamaha 2003 90HP 2 Stroke Problem

    Problem: On the water, after 15 minutes in-gear idle speed and 30 minutes @ 4000RPM, back to in-gear idle speed for 10 minutes, engine sounded like it was running very rough when back to idle speed. Motor looked like it was shaking quite a bit. Idle speed was bouncing from 1000 to 1400 RPM...
  2. M

    Mixing Different Type TCW-3 Oils

    I'm ready to fill up the oil reservoir on my oil-injected outboard and the existing TCW-3 oil is Supertech from Walmart. I'm going to switch to Pennzoil synthetic blend (already have a jug). Any issues with combining the two oils?
  3. M

    HELP need on Merc 50HP

    We're on a fishing trip in Canada. No technical support available, no stores, etc. One of the boats came in yesterday with problems. Motor is an older Merc 50 HP. We're guessing the motor is from the '80's. Identification on the motor says "Classic Fifty". Serial number is 0B136469. We can't...
  4. M

    Marine Sealant Question

    We are replacing a transducer on a fiberglass boat and there is a 5/8" diameter hole where the existing broken transducer cable went through. The hole is close to the waterline, being under a swim platform. We are replacing with the same model transducer and will use the same hole. I know...
  5. M

    1986 110HP Crossflow Help With Stuck Thermostat Needed

    I have a 1986 Johnson 110HP crossflow V4 (bubbleback). Got boat out of winter storage and on first fire-up, starboard side overheats. I shut it down before the alarm. Running on muffs in driveway for blowing out the fogging oil and quick check out. Port side is cool 110 DegF (water is cold...
  6. M

    Squeeling noise after installing new prop

    I switched from a Yamaha 13 x 19p SS 3 blade prop to a 13 x 15 aluminum 4 blade solas prop. When throttling back quickly, I hear a squealing noise, never had this before. Boat is a 17' CC with a Yamaha 90HP 2 stroke. Package weighs about 1900#. I dropped to 15 pitch because of two reasons...
  7. M

    Surge Brake Explanation Needed

    I need some explanation of surge brake systems. A friend is buying a 22ft boat/trailer. The trailer is a tandem axle trailer and has surge disc brakes. I believe the trailer is in the 5500# range. The present owner has said something about a resistor that can be changed depending upon the...
  8. M

    GPS question

    I'm looking to replace an older Garmin GPS which has failed intermittenty, probably due to heat (sunshine). I'm looking at a Garmin 541S. The info available says "preloaded with all U.S. coastal areas". I'm boating in Southwest Florida, mostly inland waters, but may venture out into the gulf...
  9. M

    Trailer Keel Roller, Need Help

    I am starting to address several trailer deficiencies and the first one is the keel rollers. The trailer is a bunk trailer with two keel rollers. The rollers are 12" with 5/8" shaft. The rollers that came with the trailer were deformed because of too much weight on the rollers. I adjusted...
  10. M

    Battery Boxes

    I'm getting ready to install a replacement deep cycle battery in my center console boat. I see that the old battery trays don't seem to be available any more. All I see now are full height boxes. I'm going to guess that this has to do with some regulation. All of the boxes are a bit high for...
  11. M

    Prop change for 90HP Yamaha?

    I'm not sure if I should be posting in the Prop section or the Yamaha section, but here goes. I need a bit of help determining whether my issue is the prop or something else. My goal is to get on plane quickly and top speed is a much lesser issue. I boat in skinny water and want to be on...
  12. M

    Shoot-Through-Hull Transducer

    I am planning on installing a shoot-thru-hull transducer on my boat, 2003 Century 1700CC boat, 15 degree deadrise, assume no coring in the fiberglass. I already have a transom mounted transducer going to a different sounder, and am adding a new sounder, one that will be better at picking up...
  13. M

    New to Fiberglass Boat Repairs

    I need some advice. I've been boating for 3 decades, but just acquired my first fiberglass boat last year. Soon I'll be drilling holes and making small repairs. I need some general information on what to do and what not to do when drilling, cutting, etc. That would be the extent of my work...
  14. M

    Owner's manuals?

    A friend just bought a used boat with 2002 Mercruiser 3.0 with Alpha One, Gen 2 drive. We have the service manuals (#14 & #26), but we are in need of something a bit more basic, like an owners manual or operators manual. I only know outboards, so this is all new to me. The service manuals...
  15. M

    Garboard drain Replacement

    I need some help. A friend has a fiberglass boat that has a garboard drain whose screw holes are stripped out. I'm wondering about the correct way to fix this problem and remount the drain.. The boat is a 2002 Glastron SX175. I am not anywhere near the boat and I have no pictures to provide...
  16. M

    Battery Oooops

    Not sure if this is the right sub-forum.... Cleaning out the boat tonight, first chance in 2 weeks, after returning from a Canada fishing trip. Checked my battery gauge for the two batteries. Main (deep cycle), came up dead. Never had that happen. Looked down at the key switch for the...
  17. M

    Mercruiser Buying Advice

    Son-in-law is looking to get into boating. My experience is outboards only, so I am of no help to him. Chances are the boat will be 17-18 ft, so the I/O will be "smallish". Any tips for what to look for as far as problems when buying these things, as in, problematic items with Mercruisers in...
  18. M

    Lug Nuts

    Wonder if all lug nuts for 12"-20 studs are 60 degree cone angle? Pulled my wheels and the nuts came off very hard. They were 3/4 hex nuts and the cone was deformed from many years (20+) of on/off and the coning was somewhat dished. Not sure what the cone angle ever was; it surely isn't 60...
  19. M

    Super Tech Marine Grease Changing Color

    Picked up my grease gun to lube my axle bearings and found that the grease coming out of the gun was a light tan color. Imagine my surprise. I thought maybe I had inadvertently put a different lube in the gun. Pulled the tube and it was light tan on the end that the grease comes out and the...
  20. M

    Bore Scope or Small Camera for Cylinder Inspection

    Anybody know of an inexpensive bore scope or small camera that can be used to look around in the cylinders? If camera, I'm guessing this would be USB plug into laptop. I'm curious what lurks inside without pulling the heads. I used to have a little light pipe that I used on rifles to check...
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