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  1. Scott Danforth

    Regal valanti 170. Omc 4.3 v6

    get rid of the batwings before they kill your motor. simply google batwing manifolds no idea what went into the motor in 2018, however wont change hp much between cheap cast pistons or forged unless there was a blower on the motor. being in a boat, you are limited on cam choices
  2. Scott Danforth

    Mercruiser 5.7 won’t make power

    yes, it should be steady if you are taking readings from the plenum. however you are most likely taking readings upstream closer to a cylinder so you will get pulses.
  3. Scott Danforth

    Regal valanti 170. Omc 4.3 v6

    Going from 2 barrel to 4 barrel will gain you maybe 10-15 HP. Going to vortec heads will get you another 20hp or so So from your 37knots to maybe 40knots Did you replace the batwing manifolds yet
  4. Scott Danforth

    Mercruiser 5.7 won’t make power

    Depends where you have the cam set and where the timing is. 15 to 18 inches of mercury is where I would expect at 0 up at idle with 8 BTDC base timing Bring the base timing up to 10-12 BTDC and you will bring the idle vacuum up. Did you get a fuel pressure reading while under load?
  5. Scott Danforth

    Boat swamped, let's see if we can get it running...

    Or get towing insurance and call it an adventure...... Keep extra waters and beers for the tow Capt
  6. Scott Danforth

    Mercruiser 5.7 won’t make power

    Yes, then I needed more power and built a BBC
  7. Scott Danforth

    Trailer bearings wear out ultra quickly.

    You need new axles
  8. Scott Danforth

    Mercruiser 5.7 won’t make power

    I ran the same cam in the SBC on the Rogue. spinning VP DuoProp B6 props (about 23p) and pushing 4200# out of the hole almost instantaneously. I dont think its a prop issue. however toons are a different animal. the lower the drive in the water is does load the prop up a lot more, however...
  9. Scott Danforth

    Prop talk?

    no idea. what drive ratio, what does your boat weight, and all the other questions that you must answer in the prop forum. for best results, you should have a Mod move this to the prop forum. (just report your thread, and the mods will move it)
  10. Scott Danforth

    Idles great / misses when throttled up

    if this is accurate, you need to pull the motor and do a complete rebuild on it. the motor may run and it may idle, however it will not have any power did you over-tighten the rocker adjusting nuts? the ignition troubleshooting guide is in the stickies (adults only) at the top of the link
  11. Scott Danforth

    Deck cleat question

    PVC has no strength, and PB will not stick to it. so even if the PVC was screwed to your boat, and the cleat is screwed into PVC, the first time you tug on the cleat, its going overboard with a section of your PVC trim and what ever it was you tied onto it. cleats on a boat normally go thru...
  12. Scott Danforth

    E85 in Chrysler outboard?

    2-strokes do not do well with E85 or any high alcohol fuel without a really expensive fuel system and a lot of tuning if you want to save the environment with an old 2-stroke, either buy a really really good 2-stroke oil to reduce sludge build up in your exhaust (unburnt fuel and oil), or go...
  13. Scott Danforth

    Having trouble finding points to elec conversion kit. 91 3.0 mercruiser.

    are you sure its play, or the mechanical weights moving. rotational movement is required for the mechanical advance to work. side to side movement is the bushings. if your distributor shaft has side to side play, you must go to NAPA and buy the two distributor bushings. bottom one is about...
  14. Scott Danforth

    portable jump starter.

    or just add a second battery with a battery switch
  15. Scott Danforth

    Mercruiser 3.0 diagnosis / serial number decode

    Your float level or the needle and seat
  16. Scott Danforth

    1989 Sea Ray 160

    No. What kind of filter?
  17. Scott Danforth

    Should I buy-2002 Sea Ray 240 Sundancer

    First, Welcome aboard second, the Mechanic is lying as he wants to sell the boat third, if its just the tiller arm fix, pull the drive, the kit is fairly cheap and do it yourself as far as the corrosion, most likely the boat sat in the water a long time. and that was salt water. if the...
  18. Scott Danforth

    Mystery issues with Volvo Penta since I/O service

    guessing the drive hasnt been coming off for its annual maintenance with that stated, using the tilt rams and a block of wood and the 1" gap you have you should be able to force the drive off the housing taking the gimbal bearing with it in about 20 minutes. those two tilt rams at full...
  19. Scott Danforth

    Mercruiser 5.7 won’t make power

    use a dial indicator on the cam lobes, a degree wheel on the crank and the cam card to see if your cam is installed at 0 degrees now that you have the intake off. if you have a wiped out cam lobe, it will look like someone went at it with a grinder
  20. Scott Danforth

    Are Impellers Unique?

    same with I/O's impellers do not "suck" water and can not draw water up hill. they can only push water, and are required to be submerged to prime and start pumping, and either remain submerged, or the pickup on the lower unit is designed that as the boat gets faster and comes out of the water...
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