OEM 155 Pump Talk

[JT_Freeride]

nice write up.

can you explain the difference between the R&D seal and the one JM & Thrust sell? I am in the same boat as you were, i bought the R&D seal and it ended up being to thick as you described. I made a jig and milled it down to fit my setup. I assumed the JM & Thrust ones would have been the same as the R&D, but it sounds like they are different.

They are completly different the new one is a softer rubber like the oem is and the metal ring inside isnt as thick as the R&D, honestly I would never recommend the R&D one unless you have to push your pump back like 3mm for some odd reason.

 

[JetManiac]

The 155mm pump to shoe seal was only used in blaster2's made in limited numbers in 1995-1996. Yamaha in their wisdom discontinued this seal sometime last year.

R&D started making a seal and until very recently it was the only option. The oem 155 seal has rubber 'wings' that compress as you slide the pump forward, just like on the 144 seal. The R&D seal has 2 ribs instead and apparently (at least on this last batch) it is a little thicker than the oem seal compressed. The new seal looks just like oem and fit is the same.

 

[JT_Freeride]

Also really curious to know if anyone has done a 155 Oem to a 144 mag solas , for budget set up they cost around the same . I really wounder which performs better with a limited setup.

The oem 155 is much cheaper than a solas mag. you can get a 155 pump for around 0-$150 only thing you need is a prop (which both do) and a wear ring unless your pump is from a B2 (I think there is another that uses the threaded ring but im not sure). and if you plan on putting trim the thrust trim comes with the reduction nozzle and steering nozzle.

 

[Jr Freestyle]

The oem 155 is much cheaper than a solas mag. you can get a 155 pump for around 0-$150 only thing you need is a prop (which both do) and a wear ring unless your pump is from a B2 (I think there is another that uses the threaded ring but im not sure). and if you plan on putting trim the thrust trim comes with the reduction nozzle and steering nozzle.

It's actually very close in price , once you factor in 155 prop, reduction nozzle, 155 seal and pump shoe

 

[JT_Freeride]

As for which pump is better solas or oem 155 it all depends on what you ride. I was unable to test it in white water as the surf was pretty small and cold. I would still imagine the solas will stay loaded longer I also have a superjet JD grate on still so its not loading the pump to its potential. I will be changing out the stubby cone for the stock cone and see if there is a difference, then the intake grate. I will update this thread after every change and ride report.

 

[JT_Freeride]

It's actually very close in price , once you factor in 155 prop, reduction nozzle, 155 seal and pump shoe

The solas mag for arguments sake lets just say its $500 shipped to your door. Both pumps need a prop and the 155 prop cost me $275 shipped which is the same price as a hooker which you need a big hub for a mag.
Now for wear ring again both pumps need one if you want to get the most out of it again both are the same cost maybe $10 more for the 155. Steering nozzle and reduction nozzle once again both pumps need it because we are comparing apple's to apple's here (solas mag only comes with the stator) to make it easy Thrust trim is $50 more for a 155 set up and comes with everything, as for oem stuff its all the same price for both pumps you would use a 144 steering nozzle on the 155.

 

[yamanube]

The solas mag for arguments sake lets just say its $500 shipped to your door. Both pumps need a prop and the 155 prop cost me $275 shipped which is the same price as a hooker which you need a big hub for a mag.
Now for wear ring again both pumps need one if you want to get the most out of it again both are the same cost maybe $10 more for the 155. Steering nozzle and reduction nozzle once again both pumps need it because we are comparing apple's to apple's here (solas mag only comes with the stator) to make it easy Thrust trim is $50 more for a 155 set up and comes with everything, as for oem stuff its all the same price for both pumps you would use a 144 steering nozzle on the 155.

I think the majority of people considering this are replacing a stock 144 so they already have a wear ring, impeller and nozzles.

 

[JT_Freeride]

I think the majority of people considering this are replacing a stock 144 so they already have a wear ring, impeller and nozzles.

Okay so if that's the case you can buy a complete 155 pump for sub $200 and now you have everything you need. Impeller is irrelevant both pumps require a impeller even if you have a hooker in your stock pump you still had to pay for it at one point and you can always sell it to offset the cost. But if you have a hull that excepts a 155 and you put in a 144 shoe I think the cost and time to change it to a 155 might not be worth it again i only rode the ski for an hour and still need to make adjustments.

 

[Jr Freestyle]

Okay so if that's the case you can buy a complete 155 pump for sub $200 and now you have everything you need. Impeller is irrelevant both pumps require a impeller even if you have a hooker in your stock pump you still had to pay for it at one point and you can always sell it to offset the cost. But if you have a hull that excepts a 155 and you put in a 144 shoe I think the cost and time to change it to a 155 might not be worth it again i only rode the ski for an hour and still need to make adjustments.

Your missing the point .

I am one of the many that have all the 144 stuff so just require a 500 solas .

For me to upgrade to try oem 155 over solas
200 for used 155oem pump
100 for reduction nozzle trim
100 for pump shoe
40 for seal
Prop -wash

So what I'm curious if it's worth all the work for the same cost , because this whole oem 155 thing is all about doing it on a budget , because clearly if money was no option I would buy a 155 skat mag.

 

[air blair]

Tunnel, tunnel,tunnel. Don't forget. I'm about to try out some different props to different reduction nozzles on the oem 155. I personally would choose 155 oem over a skat set back 144. All propped and tuned properly. Both hit well. Easiest to put it in comparison is more of a yank on your body and you squeeze throttle. Thrust on the cheap. Depending on steering nozzles you use figure on messing with cable extensions. Or steering cable mount extending. Not a super easy slam dunk.


Air blair cell

 

[JT_Freeride]

Your missing the point .

I am one of the many that have all the 144 stuff so just require a 500 solas .

For me to upgrade to try oem 155 over solas
200 for used 155oem pump
100 for reduction nozzle trim
100 for pump shoe
40 for seal
Prop -wash

So what I'm curious if it's worth all the work for the same cost , because this whole oem 155 thing is all about doing it on a budget , because clearly if money was no option I would buy a 155 skat mag.

I cant give a definitive answer if its worth it. A mag pump in white water is better there's really no arguing that. It depends on where and how you ride, I can say that the 155 out preformed the 144 mag in power it honestly felt like I had a 850 in the ski. If i were you i would stick with the 144 and get the mag you will be very happy with it. The problem is that to upgrade the 155 to a mag is $2600 so if you require a mag pump for how you ride then stick with the 144

 

[air blair]

My question today is: will the oem 760 prop from a blaster2 work for my limited 760 setup in a light hull. Havnt tried it yet and if not would it push a 701 better or worse. I think it'll work but not ideal.


Air blair cell

 

[air blair]

Come on somebody answer before I spend the time learning. Tick tock for Wavedaze.


Air blair cell

 

[JT_Freeride]

If it's a 760 from a b2 I don't see why not but that engine set up is way worse then a 61x

 

[vshockey10]

My buddy had a b2 impeller in his 760 sn then he took my 7/12 skat and noticed an improved bottom end he said


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[JT_Freeride]

The 64x cylinders are garbage imo. my buudy ran one in his SN engine was tuned fine and it was crap all around terrible down low and terrible up, only went about 35-40 mphs we swapped a 61x cylinder and 38s and it was night and day. `

 

[air blair]

If it's a 760 from a b2 I don't see why not but that engine set up is way worse then a 61x

Kinda sorta. A little cylinder port matching and a small exhaust port job with a dremil and I was happy down low. Maybe I'll just toss this 6/12 c75 on to be sure and tinker with props after Wavedaze. I need the time spent on tuning more.


Air blair cell

 

[yamanube]

My buddy had a b2 impeller in his 760 sn then he took my 7/12 skat and noticed an improved bottom end he said


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Did your buddy have a 155 in that SN?

 

[vshockey10]

Yes


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[WB1994]

It's actually very close in price , once you factor in 155 prop, reduction nozzle, 155 seal and pump shoe

I cant give a definitive answer if its worth it. A mag pump in white water is better there's really no arguing that. It depends on where and how you ride, I can say that the 155 out preformed the 144 mag in power it honestly felt like I had a 850 in the ski. If i were you i would stick with the 144 and get the mag you will be very happy with it. The problem is that to upgrade the 155 to a mag is $2600 so if you require a mag pump for how you ride then stick with the 144

I don't want to argue that point but would love to discuss it. Why does a mag pump prosses white water better than a stock pump?