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By Joe Breaux
Got a 2017 Massimo MSU500 UTV with thermostat malfunction.. hot light comes on in 4-5 minutes but radiator is ice cold... where exactly is it? The hose neck on the head has nothing in it. I was told it was down by oil drain plug.. only thing I see is water pump.. Is in inside pump housing? Cant find any exploded diagrams that show it.. how to I remove it? any help would be appreciated
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By Prepper
I'm working with a 2015 MSU-500. Basic symptoms are it cranks well, but will not fire. It has spark, and it has fuel spraying out of the injector (and spraying starting fluid into the throttle body and plug hole makes no difference). It has compression. I bought it not running, and no other information was available. It has 775 miles on it and 127 hours. It looks to be in very good shape. Previous owner replaced fuel pump, ECU, coil, plug, and the fuse/relay box that mounts on the firewall, then gave up.
My questions relate to cam/valve timing, considering the symptoms and diagnostics so far. My thinking was the woodruff key sheared off and the crank spun, making it out of time. My question is, by the pictures attached does anyone have an opinion as to the cam/valve timing being correct? In the crankshaft picture you can see a timing mark visible. In the camshaft picture I have arrows directed towards what I think are timing marks (which appear to be exactly 180 degrees from one another). However, the long arrow in what appears to be bolt configuration in line with the piston/rod line. Here is a puzzling note... in the position you see in the pictures... I have valve lash on both the intake and exhaust. I think it's at TDC, given the visible crank timing mark and valve lash on both valves.
Any thoughts ? Does this appear to be in proper valve time ? Have I missed anything simple ? Thanks in advance for your input.
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By Matthew Smith
2013 Bennche Bighorn 700 EFI
I just picked up this project that I was told would crank, but not start. This is what I’ve figured out so far….
I installed a new battery and get all dash lights, head lights, and brake lights on when turning the ignition on. Fuel pump even turns on. It does not crank with the key, but would when I jumped the starter solenoid, so I replaced it…..no change.
Figured I’d check for spark and compression while I was dorking around. Compression is 150 psi, but there is no spark. Replaced the spark plug… no change.
So, is my new starter solenoid bad? Could it be the brake or gear position switches even though the brakes and neutral lights come on? Not sure where to go from here.
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By SteveS
While driving the MSU 800, it runs good but it lately it will not go over 20 MPH. The side by side will hesitate when it reaches 21 MPH, but it will run good under 20 MPH. What is the issue?
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By Adrian Domingues
I have 31 miles on my new T-Boss 550. In order to start I put in nentural and the emerage brake on and push down on brake paddle, then trun ket and get nothing, with key still on I shift to reverase and the back to netural and it starts. Anyone know what is happening.
Thanks for your help
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