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  1. WesNewell

    max Horsepower rating

    Not concerned about insurance. Only legality. And reason for under rating. I suspect it's done to try and up sale.
  2. WesNewell

    max Horsepower rating

    I've got a Lowe Stinger 175 boat. The max HP rating on the plate is 75. However, when I compute what the max could be according to regulations it's 175 HP. Boat is 17.5' x 7.5' transom. Lowe hasn't responded to my question on this. Now I don't want a 175hjp engine for this boat, but a 115 would...
  3. WesNewell

    Prop for 1987 Lund pro angler - Yamaha F50?

    http://solaspropellers.com/index.php/products/prop-finder 14-17p depending on load Make sure the engine is installed at the proper height for max performance. IOW's the av plate is not below hull bottom.
  4. WesNewell

    Prop slip and cavitation.

    the spillage mark just shows the hub is slipping. Don't assume it just slipped that much. It likely slipped many rotations if it was noticeable. You likely need a new hub or prop..
  5. WesNewell

    Stratos 375 XF Prop...

    the specs I got on your boat puts dry weight at 1700# with a max load of 1200# and a 32 gal fuel tank and max hp at 135 hp. The above results were with a 600# load and 30 gal of fuel at sea level. Use the prop selector to get a rough idea of what pitch you want for your conditions. One of the...
  6. WesNewell

    Stratos 375 XF Prop...

    This is what I get from the merc prop selector. Boat type: Fiberglass Fish Usage: Overall good performance/0 ft Engine Manufacturer: Yamaha Engine Type: Outboard Engine Year: 2005 Number of Engines: One Engine Family: Yamaha 4 Cyl 4-Stroke Engine: F115 4-stroke Drive / Gear Case: Yamaha...
  7. WesNewell

    Mercury Optimax 150 2011 boat not getting up to full rpm

    Brand of prop shouldn't matter that much at the same pitch. If I had to make a wag, I'd think your tach is set wrong since a 17p prop can't hit 40 mph at 4500 rpm with a 1.87GR, which I'm pretty sure is the gr of a 2011 150hp merc.
  8. WesNewell

    Mercury Optimax 150 2011 boat not getting up to full rpm

    Mercury prop selector shows you being propped about right and getting about the right top speed. First I'd check the tach for proper setting. Check engine height. Check hull not dirty. Flotation not water saturated.Fuel flow and engine condition.
  9. WesNewell

    13 pitch or 15 pitch for Mercury 50hp command thrust

    you might also want to remove the air intake restricter to boost your hp upwards of 60 hp. Item 21 in this.
  10. WesNewell

    How much of a pitch change do I need?

    Looks to be too low to me from that photo. Here's mine, which is as high as it can go. reccomended heights
  11. WesNewell

    Jon boat prop question

    Put your engine down in line with the hull and take a photo similar to this to check engine mount height. An engine mounted too low can cause up to 20% loss of speed and fuel economy. Assuming your boats dry weight is 500#, you should be able to get about 32 mph out of it with your engine with...
  12. WesNewell

    1860 prop selection

    Depends on the hull. If you have a center keel Like I do on my oat, then about 2 inches above it Water is 780 times the density of air, so the drag matters at any speed. If you don't have a keel and the hull is flat at the back, then ~ a half inch above is good. If you have a setback plate, then...
  13. WesNewell

    Merc 50 hp RPM Issues

    From the photos it appears you can't raise are lower the engine at ll because of where the mount holes are drilled. Can't really see the hull bottom shape in either photo very well but it appears to have a pronounced v at the center, which would mean you want the av plate at least an inch above...
  14. WesNewell

    25 hp blowout The

    Sorry but that's not my experience with aluminum boats. For best performance i had to raise my engine to where the av plate was 1.5" above the center keel. Before raising the engine my max speed with a smooth ride was 35 mph. I could get 40 mph by trimming the engine up, but the boat porpoised...
  15. WesNewell

    What pitch/PN SpitFire prop for new 50hp 4stroke on Tracker Pro 170???

    Found attachment button. Hope it works.
  16. WesNewell

    14' Mirrocraft & 20hp Johnson prop selection help.

    Post a picture of the rear of the hull and I can give you a better estimate of where the av plate should be in relationship to the bottom. Here's mine. Yardstick is sitting on top of av plate.
  17. WesNewell

    Which Prop? - Crap Shoot - 1974 Mercury 650 on a 15' tri hull

    That boat only weighs ~500# and is rated for 60hp max. No way should he go below a 17p prop with a good running 65hp. and yes, properly running and mounted he should be getting over 40 mph. Maybe his speedo is off, or he's got the engine mounted way way too low.
  18. WesNewell

    Outboard Position

    This should interest you.
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