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  1. Texasmark

    When opening throttle, inline 6 speeds up for 20 s and then lose power

    Yes. Your squeezing the bulb replaces the sucking action of the fuel pump. Rebuild pump and check fuel lines for cracks which, if on the inlet side of the fuel pump. allow the fuel pump to suck air rather than fuel. Having any fuel filters new would be a good idea too.
  2. Texasmark

    coil check values

    The coil has to transfer watt seconds of power to the spark plugs to fire them. Thats volts x current x pulse width. Being a product, and the fact that you are upping roughly 200V to 40kv (open circuit in todays engines), normally plug fires around 18kv and the gap drops to a low voltage while...
  3. Texasmark

    When opening throttle, inline 6 speeds up for 20 s and then lose power

    I'm finding that the plastic check valves internal to squeeze bulbs are questionable. 115 engine uses a 5/16" or larger fuel line...my OEM is 5/16..... Ebay has inline aluminum check valves and if what Roscoe said doesn't solve the problem, add a check valve to the inlet fuel line to the...
  4. Texasmark

    Tower of Power Cold Start Questions

    I got tired of all that crap and installed an electric fuel pump powered by the ignition key being ON or START positions. Activate the fast idle function...lift the lever on the control or push in the black button and advance the throttle arm to 45*. Turn the key to On for a few...
  5. Texasmark

    When opening throttle, inline 6 speeds up for 20 s and then lose power

    Take it back out and when it starts acting up, squeeze the bulb. If it responds replace the innerds of the fuel pump. If it doesn't help, check your fuel tank vent and ensure it's functioning....gotta have air get into the tank to replace the gasoline you are removing.
  6. Texasmark

    Is 90hp ob enough??

    Well Jim we do have some similarities. My first boat was an older 13' wooden stepped hull with a 25 Wizard. It came with a 2 blade aluminum prop from Western Auto, I bought new for $400 as I recall. Later I bought a Michigan bronze 3 blade. I called the first one my speed prop and the second...
  7. Texasmark

    1997 mercury 115 hp

    I had temp problems with a CDM on a 2002 90 hp so yes they can and will. Might get some white thermal transfer grease and put it on the bottom of your module before you mount it to the plate and do it to all of them while you are at it. While you are at it, do the same thing to your...
  8. Texasmark

    Anti Cavitation Plate Height

    Don't feel slighted. I have been boating, with my own boat since about 1957 and it has been Cavitation Plate all my life till I got on here. The big guns straightened me out. Once you objectively look at the two words, its easy to see that they were right. Wink!
  9. Texasmark

    Ran with no gear oil :( 2015 4 stroke 30hp

    Its always a good idea to change all the fluids in any used equipment you buy. With that practice, you would have caught the fact and saved yourself bundles. On something that I think is in OK condition but hasn't been operated for a long time, I buy it just on sight and get home and get...
  10. Texasmark

    Question regarding prop shaft

    SS comes in all flavors and mixes. If any iron is in the steel which is normally the case on OB shafts with Chrome and Nickel, you will attract a magnet. Also on some SS props you will notice corrosion as I have seen and discussions are all over about combating it. OMCs first SS prop was the...
  11. Texasmark

    Mariner DVA readings at ignition coil

    The DVA is a sample and hold circuit. The trigger pulses are narrow with a long rest time. To get a meter to read such, you need a storage element (capacitor) to "hold" the voltage sampled when the trigger fires. With your DVA working best when the rest time is greatest, I'd say it and your...
  12. Texasmark

    spun prop?

    I assume that model of the Chrysler/Force has the geartrain setup like Mercury in that F contains an overrun clutch for times when you are at some speed and cut the throttle...allowing the engine to slow but the prop to follow the rotational pressure caused by the water passing over it at the...
  13. Texasmark

    Trouble getting on plane

    The boat in my Avatar is my stock 90 hp 2 stroke (2.33 gearbox) pushing my 16 1/2' aluminum bass boat kissing 50 MPH with a Ballistic 13x24 3 blade SS. Add a person and I could do 45 easily. I also had a 21P of the same prop and would overrev easily at WOT....not enough pitch. My best hole...
  14. Texasmark

    Measurements of Chrysler flared washer/spacer and long cone

    I miss Frank too. Enjoyed his posts and being a previous Chrysler owner (2 engines), could relate to his posting. I do recall him playing around with an engine in the 60-70 hp class, 3 cyl I think. There was something distinctly different about that engine that attracted his attention. He...
  15. Texasmark

    happy happy joy joy

    Fuel consumption on those big bore, low rpm OMC engines is why they engineered "Loop charging" 10 years later introduced in the 3 cylinder Triump 55 hp.....cut the fuel consumption in half besides redoing the lower unit and prop style/RPM and all that for a totally different OMC...
  16. Texasmark

    Top Speed Issues

    Thats high enough for adjustments to fuel air ratio. There are charts on the www to help you size correctly. I think my service manual has a chart for my 3-4 cyl 2 stroke OBs.
  17. Texasmark

    Question regarding prop shaft

    You can bet the drive line...prop shaft and drive shaft from engine to lower unit are solid SS.
  18. Texasmark

    Bass Boat Seat Pedestal Question

    I had 2" on my '89 630. Don't remember if they were operator adjustable or not. Course it was the back troll layout and all the seats were on pedestals.
  19. Texasmark

    Boat keeps porpoising.

    That is what I was thinking.....hull has a "hook" from sitting on a trailer with inadequate support. But, learning how to drive your boat really has the most to do with it.....pretty much.
  20. Texasmark

    Measurements of Chrysler flared washer/spacer and long cone

    Nothing magical about it. The OD at the prop is the OD at the rear of the prop casting or slightly smaller...a few mm. On length, the taper would terminate at the rear of the LU casting. Just how much performance improvement I have no idea. I had a 1971 85 hp with the cone and my answer is...
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