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Can anyone help with prop selection for an Xpress H22 with 200SHO?
Posted on 8/27/21 at 8:16 pm
Posted on 8/27/21 at 8:16 pm
Recently purchased an Xpress H22 and finished the break in period this week. Went to go WOT and all I could get out of it was 47mph and 4600rpm. That’s GPS speed. One person and a full tank of gas and nothing else in the boat. It came with a power tech 23 degree 3 blade. I know from reading other threads and forums that the RPM I’m getting is not correct but I’m also very conflicted on which direction to go for a new prop so any help would be appreciated!
6
Posted on 8/27/21 at 9:14 pm to Michael829
My guess would be the motor height is too low. I had a 22 with the 175 show and could touch 57 with a 3 blade powertec 19p I think and 54 with the 4 blade Solas 18p. It should be an absolute rocket ship with the 200 sho
Posted on 8/27/21 at 9:20 pm to Michael829
Put a Mercury Tempest Plus in that rig, should fly. Maybe a 21P?
Here’s an idea of what you should be getting:
Perf Bulletin
Here’s an idea of what you should be getting:
Perf Bulletin
This post was edited on 8/27/21 at 9:22 pm
Posted on 8/28/21 at 6:15 am to 72LATraveler
I have a hydraulic jack plate also and messed with height for a while so I don’t think it’s that.
Posted on 8/28/21 at 6:38 am to Michael829
I would call power tech and talk to them. They are very knowledgeable about props and what they should do. I don’t see any reason why the yammy shouldn’t spin the hell out of a 23p.
Might be a dumb question but you did trim the motor right?
Might be a dumb question but you did trim the motor right?
Posted on 8/28/21 at 6:40 am to civiltiger07
I went through every combo of trim and height I could.
Posted on 8/28/21 at 6:46 am to Michael829
Was 4600 the highest rpm you saw or does it just stay at 4600 no matter where you are the Jack plate and motor trim?
Posted on 8/28/21 at 7:13 am to civiltiger07
4600 was the highest I saw. It would fluctuate between that and 4200 while adjusting trim and jack plate
Posted on 8/28/21 at 8:21 am to Michael829
My F250 will spin the hell out of a 3 blade 21P or 4 blade 19P….but didn’t like when I went up to a 23P. Seemed to be a big jump for my setup.
Posted on 8/28/21 at 9:05 am to Michael829
200 rpm per 1 degree of pitch is the ratio, drop down to 20p or 19p. Most of those tin boat are stern heavy, would find a merc 4 blade in 19p to try.
Posted on 8/28/21 at 11:14 am to Michael829
That 200 sho should spin the hell out of a 23p. The boat hardly weighs anything. Even dropping to a 19p,in theory you would only get another 800 rpms. That would put you at 5600 which is better but i think you need to be around 6k.
Posted on 8/28/21 at 12:01 pm to Michael829
Don’t know much about center console boats but I have a 25P Mercury Tempest prop on a 175 ProXs and it will turn out 5600 rpms. Motor is on a 18’ 9” Triton bass boat. I do have a Jack plate and boat trimmed out with just me and half a tank of fuel will run 64.8 mph. A 200Sho should be able to turn a 25P prop no problem. But like I said I do t know much about center consoles and how they affect rpms and what not on a motor. Running that low of a pitch prop I would think it would have that motor screaming on the high end of rpms with one hell of a hole shot.
Posted on 8/29/21 at 8:36 am to Michael829
Prop Slip calculator indicates yours to be 18%. That is rather high.
I had a similar issue that I was never able to fully resolve.
A couple things that did help reduce slip:
Prop with less pitch
Eliminated an EZ Pump (live well) pick up from directly in front of the prop. I believe this device aerated the water in front of the prop, killing the props efficiency.
I had a similar issue that I was never able to fully resolve.
A couple things that did help reduce slip:
Prop with less pitch
Eliminated an EZ Pump (live well) pick up from directly in front of the prop. I believe this device aerated the water in front of the prop, killing the props efficiency.
Posted on 8/29/21 at 10:27 am to Michael829
Search express groups on Facebook. I’m in a few boat brand groups and people are always talking about tweaking performance with props.
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