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  1. Jim Hawkins

    I need to extend Merc wiring harness.

    I have controls for a (I think) 2003 Mercury 60HP. I got this used and need to extend the wiring harness as it is going on a houseboat with the helm far forward. I could get an extension but the chase where my controls run is on top of the pontoon and under the deck which would make it hard to...
  2. Jim Hawkins

    New F70 stalls in forward

    First, I know it's under warranty but my problem is now intermittent and probably not the motor I don't want to waste time if I'm told it worked fine in the shop. So, new F70 running along on plane suddenly shuts off. Restarted fine (back in neutral) but as soon as I put it in forward it cuts...
  3. Jim Hawkins

    Power Cat - Same rule as V hull?

    I have an 18' Seagull cat and am working at getting an F70 Yamaha motor propped right. Using an old prop, strictly for a base line to determine what prop to use I found the boat could only get to 4400 rpm's top. When talking to the "Prop Doctor" in Key West Dan's first comment was, "sounds like...
  4. Jim Hawkins

    Propping a F70LA Yamaha

    I had planned to take the prop off my old 90HP 2 stroke Yamaha and use it as a test to see if I wanted to adjust diameter and pitch on my new 70 4 stroke. It doesn't fit. It just barely hits the motors zinc trim tab as shown in the first picture. Even though all the prop selector tools show it...
  5. Jim Hawkins

    Replace or Re-Rig Hynautic Steering

    I just got a new 70HP Yamaha F70LA and thought my old steering would bolt right up. I was wrong. The old steering (see Photo) had a bracket that bolted to the front of my old 90HP Yamaha but on the new motor (see second photo) those bolt holes aren't there. I need a way to make the old system...
  6. Jim Hawkins

    Rigging a new F70LA or How I Spent my Summer Vacation

    They told me it was pretty much plug and play. They all said it and I suppose maybe it is to folks with more brain cells than I've got but derned if I don't make things more confluted than they need be. So, taking baby steps, since I already figured out the shift and throttle cables I'll move...
  7. Jim Hawkins

    90HP Yamaha TLRC Power Curve

    Can anyone help me to figure out how much horsepower a 2004 Yamaha 90HP 2 stroke puts out at 3000 rpm?
  8. Jim Hawkins

    Yamaha 90hp TLRC 2 stroke Knocking

    My engine has a knock I first noticed while cruising. Putting an ear to the motor while idling I can hear it also. My research says it is very hard to know where it's coming from, lower unit or motor. The noise seems to run the length of the drive shaft. I realize it could be anything from a...
  9. Jim Hawkins

    Houseboat pontoon question

    My lifelong dream has been to build a houseboat, now that am am ready to build I need to finalize my plan. The boat will be small for a house boat, 10' X 30' because I am limited to 10' wide in my canal in the Florida Keys where I will moor it. I want the boat to be stable and seaworthy for near...
  10. Jim Hawkins

    Yamaha 90 HP carb rebuild question

    Can someone tell me where the heck is this supposed to be used? My best guess is that they are supposed to be cut apart and used in two places. I can see using the small O ring on the lower bowl fuel drain brass plug but the big one won't fit anywhere. Too small for either the air intake side or...
  11. Jim Hawkins

    90HP Yamaha Temp Sensor and Gauge

    My boat has a temp. gauge but it is not hooked up to my 2003 90HP Yamaha (2 stroke). I want to get it working but not sure how. I found what looks like a a sensor in the stern of the boat with 1 wire attached but the other end of the wire was a dead end under the console (see picture) Looking at...
  12. Jim Hawkins

    90HP Yamaha - No top end. Help with diagnosis.

    The motor is a Yamaha, 90HP year 2003 (I think) When I first got it several months ago it would do about 30mph at close to 5000 RPM as setup. Recently I have lost top end power. It still runs very smooth at idle and under power, it just does not get above 3500 RPM's and about 23 mph anymore. I...
  13. Jim Hawkins

    Live Well Pumpout

    I have a boat with a built in live well that no longer has any hoses or parts except the tank itself with one hole on the bottom and one hole on the side near the top. I want to make it work again but with two goals. 1. I want to be able to pump the live well dry using the same pump that...
  14. Jim Hawkins

    Almost Sunk my Power Catamaran

    Yup, almost went to the bottom of the canal from a bilge pump malfunction, here's what happened... The boat is a 1997 Catamaran by Nautico/Seagull. Inside both hulls are bilge pumps with automatic switches. When one turns on the other does too. They are accessed by two round ports near the...
  15. Jim Hawkins

    Homemade LED light inserts.

    Nothing earth shattering new here, just my version. My nav lights on the sides of my center console would not work so keeping the fixture, I pulled the lamp base guts and inserted my homemade LED. 4 super bright white LED's from radio shack, about $5 stuck through about a 1" X 1-1/2" piece of...
  16. Jim Hawkins

    Yamaha 90HP (2004) Oil system

    I just got a boat with a Yamaha 90HP 2 stroke and am checking things out before I use it. The first thing I want to check is the oil injection and the warning indicator specifically. I've done a good bit of reading on the system and understand it is considered very reliable so we've got that out...
  17. Jim Hawkins

    Advice on Compression Test - 2004 90hp Yamaha TLRC

    I'm looking at buying a boat with a 2004 90hp Yamaha TLRC. When I checked out the boat my Compression tester showed 90# top cylinder, 90# middle and 60# on the bottom. I assumed the motor had issues and left. Next I looked at another boat, again a 90HP Yamaha and again off on compression...
  18. Jim Hawkins

    '87 Johnson - Spark Adjustment - J30ELCUB

    '87 Johnson - Spark Adjustment - J30ELCUB Hello, while out the other day I began to lose the upper end of my throttle control. Looking at the motor, I found the spark adjust screw had vibrated it's way in to a point it was restricting advancement of the throttle. I moved it back out and the...
  19. Jim Hawkins

    Identify this part game

    I found this thingy lurking in the lower engine cover wedged under the motor while cleaning. Surely this is the part that if I know where it goes then reinstalling it will make my motor run like new, increase gas mileage and make my investments skyrocket! If I only knew what it was...
  20. Jim Hawkins

    Johnson J30ELCUB fuel line question

    I like to replace the fuel lines on my motor every few years and in doing so have a question if the lines run as they are, are correct or if it matters. From the output side of the fuel pump there is a 3/16 line that runs aft of the motor to the port side where it goes to a T. One leg of the T...
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