Stuck in a pickle

Machine Repairs
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As some of you may know, i’m running some low tier 4/4400 machine as i‘m still getting my foot in the door of the business. It’s a simpson 4400/4gpm turd box. Yesterday on a house wash my pump practically blew up, its got a hole on the bottom that leaked all the oil out. I’m looking to get a new 4gpm since it’s all my 13hp motor can push out. I know the best pumps for 8gpm are udor pumps, maybe general too. But for these weaker 4gpm pumps my options seem to be AR/GP. Is there any brand in particular that reins supreme for these lower flow pumps? I’ve been suggested by a few people to buy this AR pump i’ll link below

Here’s the link im about to pull the trigger on so i can get back to work asap

I’ve heard bad things about built in unloaders off my memory idk if this is classified as a built in. Is this a waste of money? Can i plumb a buffer tank to it or do i need a belt drive? or is belt drive only needed if you’re running exclusively off the buffer/reservoir supply?

The GPMxPSI/1100 says 4gpm is the highest i can go with a decent amount of pressure for flatwork. But i do see some people going over that limit. Would a 5/3500 be possible with 13hp or should i just stick to 4/4000? 4k is way more than i’ll ever need but it seems to be the only option for the pumps i’m seeing at 4gpm

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I run a 5.5GPM 3800PSI Allison pump with gearbox from Envirospec on my GX390. I have it set to 2500PSI which is what the GX390 can provide with 5.5GPM. $579 price. Includes the gearbox, takes 4 bolts to attach which it comes with.

Link to Pump with Gearbox

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@TexasPressureWashing I was just trying to find that page on Envirospec.

Do they give veteran discounts? I saw something on there about it.

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I forgot to ask actually.

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When my built in unloader gave, I got this unit here. Easy install and power horse. With good flow I swear it was closer to 5 gpm.

You have the ability to bypass the water to a tank with this unit as well. Just have to reconfigure the hose.

Link

You could just get the pump as well if you have another unloader in mind . That link includes the unloader

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I would definitely spend the extra $400 (including a ZK1) to not have an unloader attached to the pump. But that is thrifty.

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So you reckon I can get that with my current 420cc 13hp engine, maybe get 2800-3000 psi out of it? Most of my work is flatwork like driveways patios etc so the extra psi does help. It’s out of my budget right now since I just had to pay for insurance and school the other day, although I was in the middle of a $385 job that once completed could let me buy that pump. I might have to rent a 4gpm from home depot and finish the house wash with my X-jet. Shouldn’t be a problem i believe

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I can’t say for sure but I could see an actual 420cc pushing it to 2800-3000 PSI. The GX390 is actually 11.7HP which Honda finally admitted.

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The pump you linked says 6.3 gpm. is that correct? I’m gonna go ahead and rent a washer to finish this job so i can purchase the better pump you linked. Im skeptical if my motor is even 420cc… got the whole thing with 4gpm pump for $800 which sounds too cheap considering the gx390 alone is around that if not more.

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That’s what I linked

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It will get you by so you can save for a real set up

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Predator makes 420cc motors. The website has a text error. The previous page shows 5.6GPM when you click it lists the bigger one. You can call and order as well.

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You must be bypassing quite a bit of water when you’re on the trigger no?

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@mikesPWclean where are you located? If your close to Charleston SC I’ll loan you one of my backup units.

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For which the 5.5? No I don’t seem to be.

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When you set the unloader were you able to see how much was bypassing or was it going in to the tank?

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Curious why this is in the lounge?

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i’m in north texas, i appreciate the offer though!

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Lol yeah for the price of gas you could just buy a new one, thought I’d offer though.
I never mind helping someone if I can!

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It was a small amount when on the trigger. Most of the flow for both went to the gun.

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It’s just supposed to trickle when on the trigger. I bet you can get a bit more than 2500