Propeller truth,facts and fiction...

**HB Vic** · 08-01-2017, 06:45 AM

I'll get to props in a min, but the whole where do you run your drive perplexes me. I mean every boat is different, unless we have the same exact setup with same trim indicator, its kind of irrelevant isn't it? The boats would have to be a mirror image of each other for this question to mean anything.

But I could be wrong

**2FORCEFULL** · 08-01-2017, 07:10 AM

Originally Posted by HB Vic

I'll get to props in a min, but the whole where do you run your drive perplexes me. I mean every boat is different, unless we have the same exact setup with same trim indicator, its kind of irrelevant isn't it? The boats would have to be a mirror image of each other for this question to mean anything.

But I could be wrong

as in "X" dimension? or trim angle?? I always straight edge the drive to the boat to see where neutral trim is, on my hallett I marked the gauge... all boats should perform the best at neutral trim... and should gain top end speed trimmed up...with a lot of boats, the "X" plays a roll... neutral trim at cruise speed cause's the boat to porpoise

most boats have reference gauges... not accurate gauges..

**HB Vic** · 08-01-2017, 07:36 AM

Originally Posted by 2FORCEFULL

as in "X" dimension? or trim angle?? I always straight edge the drive to the boat to see where neutral trim is, on my hallett I marked the gauge... all boats should perform the best at neutral trim... and should gain top end speed trimmed up...with a lot of boats, the "X" plays a roll... neutral trim at cruise speed cause's the boat to porpoise

most boats have reference gauges... not accurate gauges..

I was talking trim angle, but the same can be said for X dimension imo

**2FORCEFULL** · 08-01-2017, 08:51 AM

so,..... here's where i'm at.... I added the 1.5 spacers.... the optimum drive setting when building a boat is to set the drive to where the lower cav plate is at water line (see pic) what happens though is as you go more positive trim, the plate creates drag...

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**HB Vic** · 08-01-2017, 08:58 AM

Steve maybe I missed it, but why did you add the spacer? We're you having trouble rolling over or was it cavitating? or both?

**2FORCEFULL** · 08-01-2017, 09:11 AM

Originally Posted by HB Vic

Steve maybe I missed it, but why did you add the spacer? We're you having trouble rolling over or was it cavitating? or both?

on take off you had to peddle the boat to get on plne.. it got on easy , but you could feel that the prop was slipping, then at cruse speed the same... when going to WOT...
now you can hammer it out the hole and mid range it pull hard...

but, I think it is having a neg affect on top end because of those cav plates grabbing.. I'm sure missing my ol friend brian at the real B&D marine cause he really know his shit when it comes to drives..