Question about Water Garden
Water inlet pressure is 90# Nozzle is a 3.5 gpm 25 degree nozzle. Cat pump 67DX39G1 has new check valves and new seals. I suspect the engine is not running a specified RPM but I don't have a tach. the Govenor lever is full open and the carburetor throttle is also full open. is there a way to speed up this engine it is a MZ360 Yamaha engine. I can't find an online maintenance manual for this engine. If there is one out there it would help me solve this issue. I got a TACH and as I suspected the engine is running 400 rpm slower than rated. Not as easy as I though it would be. Carburetor throttle is maxed open and governor is in the max open position.
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Posted on Jan 02, 2017
Measure the exhaust back pressure. Do you have an old O2 sensor? If so just break the ends off of it so that just the tube is left sticking thru the center. Install it in one of the O2 ports and hook a vacuum/pressure guage to it. Should read les than 1 psi at idle and no more than 3 to 4 psi at WOT.
Posted on Feb 19, 2009
How about on an aftermarket tach that bolts on the dash? It worked "fine" up until a few minutes ago. We were trying to adjust it to work with a different amount of cylinders and it shot up past 10,000 RPM and stayed there. Turned off the car and it's still stuck, won't return to 0. Any suggestions? Thanks!
Posted on Apr 04, 2010
Boy oh boy there are a lot of tachos here, unfortunatly non i would choose, you need a tacho that picks up the spark pulse from the spark plug, not one that requires a photo tape placed on the machine, Both Husqvarna and Stihl retail good quaility tachos, just place it near the spark plug and it gives a very accurate reading, they are called DET102 the Husqy part no. is 502711401.
Posted on Jul 31, 2012
Tips for a great answer:
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1. Check the power supply.
2. Check the water supply.
3. Inspect all hoses.
4. Take a look at the inlet valve.
5. Check the intake filter.
6. Inspect the nozzle.
7. Inspect the gun.
8. Check the power pump, unloader, regulator, and other valves.
Diagnosis takes this order because the things at the top of the list are more common and much easier to check. That's the good news when it comes to looking over your pressure washer. Most pressure and other performance issues will be caused by something small and simple like a clogged nozzle.
Even components like regulators and unloaders are fairly simple to replace, and can be done by confident workmen an homeowners. Once problems boil down to a power pump issue, it's usually best that the pressure washer see a shop.
Because the problems of and solutions to symptoms are so varied, we just list them below without any particular order, although we list the most common symptoms and causes first.
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