Printable View
its on amazon for $13.49 and calledQuote:
Originally Posted by huntersdad
Tachometer for Small Engine,Inductive Hour Meter for 2 Stroke & 4 Stroke Small Engine, Timorn Replaceable Battery Waterproof Tachometer for Chainsaw Marine ATV Motorcycle UTV Engine (Black)
If you ran it up to 6,000 or over and it hit the rev limiter I’d say your tach is pretty accurate. If it is a 13-19 would drag it back close to 5900-6000. 13/21 would put it right in the operating range. 19 would maintain your hole shot with little not able difference. 21 would slow your hole shot a little but give you more top speed and keep you in operating range for that motor. Ideal situation is have someone you could borrow a prop from. Some dealers actually have used props around the will loan you.
There is a prop shop close by, I will call them and see if they have something I can possibly borrow or purchase at a reasonable price. I'm just going to go with aluminum for now until I know it works and then switch to stainless
Sent from my SM-S215DL using Tapatalk
Honestly you might end up worse doing that. A SS prop will likely have more cupping, higher rake and less flex. Putting a 2" higher pitch alum might actually cause your rpm stay the same, or increase and wind up with less speed.Quote:
Originally Posted by huntersdad
Cray is right about the tach, I think back then they had a rev limiter (stock powerpack) of like 6150rpm. It might even be printed on the powerpack.
I had a 94 Javelin 17’ hull with a Johnson 115. The Raker 20 was a good all around prop for my rig with a heavy stern from the fuel tank and 3 batteries in the back. I targeted 5500 as my WOT rpm. It would turn a 22 Raker with a light load but the hole shot was beyond awful, even with a full front livewell and weights up front. The best handling prop ok that boat was an old Shooter-it jumped out of the hole but lost a couple mph off the top end by switching to a four blade.
What was the 4 blade pitch? I don't care so much about overall speed as long as I can get my rpm in range when I put the throttle down.
Sent from my SM-S215DL using Tapatalk
21p Renegade, could have sworn it was a Shooter prop but my old boat records say it wasn’t. I lost a couple rpm’s off the top when compared to the 3 blade Raker but it lifted the heavy rear end better and it handled better at all speeds.
The boat is rather rear heavy with 3 batteries, motor and fuel. Sitting still, it does sit rather low in the back. A 4 blade may suit me well if I know a good starting pitch. I dont care as much on speed as long as I could lay the throttle down without having to feather it as much to stay in the 4500- 5500 rpm range. With the 3 blade 17 pitch, it jumps and planes quick but also hits the max rpm really fast too. I have to stay around 1/2 to 3/4 rotation of the throttle lever to keep the rpm in range.
Sent from my SM-S215DL using Tapatalk