What prop do I use on a regal lsr 1800 dti Deisel

[Squeakyneil]

Hi there guys I’m new to the group. Any advise on a prop size for my regal 1800 lsr 1.7 dti . The prop on her when I bought it was the wrong one and I’m still trying to fine tune it .

 

[alldodge]

Off hand wouldn't know. If you tell us are you getting less, more and max listed WOT RPM?
What pitch is on it now?
What speed at WOT?

 

[Squeakyneil]

Iv got it down to a 17 pitch 3 blade stainless . But it’s slow on getting on the plane and does about 30 mph . Not sure if this is the right performance for the boat . I know it’s a turbo diesel but apparently theses boats go well . But I’m not convinced . Thanks for the help guys

 

[briangcc]

You might wanna peruse this thread:

Read This First!!

ESSENTIAL DATA REQUIRED When posting a question about propellers, you cannot get a reasonable answer unless you provide the following information in your post: Items 1-4 are essential for meaningful response to most questions. 1) Performance issue you are trying to correct. 2) Current prop...

forums.iboats.com

Then, once we have that info, we can better assist you. Without that info....who the heck knows if you're lugging the motor and if so by how much you need to drop pitch???

Best WAG right now is...you're lugging the motor still and probably need a further drop in pitch.

 

[Squeakyneil]

the rev counter is not working but seems slow getting up on plane . It seems to get to 40 mph and that’s your lot . I’m just trying to find out if it’s the boats capacity . If I put a 16 pitch would it give less top end

 

[alldodge]

Finding motor max WOT is 4000 to 4400 RPM
Get a laser Tach and put a piece of reflective tape on the crank pulley or damper. You need to be at the spec rpm at WOT

 

[flashback]

the rev counter is not working but seems slow getting up on plane . It seems to get to 40 mph and that’s your lot . I’m just trying to find out if it’s the boats capacity . If I put a 16 pitch would it give less top end

Not necessarily, but you really need to know what your RPM is at Wot.. MPH is secondary. No engine likes to be lugged and that one especially..

 

[QBhoy]

I know an identical boat and it had a 19 and a 21” props for it. Did just around 40 or just over. They need a little load on them to spool up the turbo. Not without their issues these engines. Turbo issues are common. You either get a good one or a bad one. Most are bad, I’m afraid.

 

[Squeakyneil]

I know an identical boat and it had a 19 and a 21” props for it. Did just around 40 or just over. They need a little load on them to spool up the turbo. Not without their issues these engines. Turbo issues are common. You either get a good one or a bad one. Most are bad, I’m afraid.

What was the overall performance on the the one you know . Not had a diesel one before but seems quiet slow . I’m thinking now could there be somthing wrong with the turbo . What’s your thoughts

 

[QBhoy]

What was the overall performance on the the one you know . Not had a diesel one before but seems quiet slow . I’m thinking now could there be somthing wrong with the turbo . What’s your thoughts

Did just about 40 gps. Or occasionally a touch over. Was every bit as quick or quicker than some 3.0 versions. Very fast hull that regal stepped hull.