Yamaha Rhino 660 radiator fan on a Massimo MSU 500?
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By owencole15
Massimo 500 will only crank when I jump solenoid with screwdriver cranks right up and runs great. But won’t start with key doesn’t do anything when I turn the key. Only thing it does is power everything as in dash and fuel pump then have to jump solenoid to crank up and drive.
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By pdwads
My wife and I bought the MSU 850-5 two weeks ago. No action photos yet. Trailered it up to our North western, property in the lower Michigan peninsula. The county had blocked our 1/4 mile long driveway with their snowplows. So we parked on the road, unloaded her and went climbing over the snow hill. She handled it beautifully. Parked her in the garage, then trudged the 1/4 mile back through the snow, then headed back down state. Can't wait for some of the snow to melt off. We'll break it in and post some pictures.
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By robwork9
Hopefully someone out there is a T-Boss 410 electrics expert or a Massimo mechanic is viewing this. I parked my 410 and it was working great. I came back a week later and attempted to crank it and nothing. Turned the key and no power. Figured it was a bad/low battery so I charged it. Still nothing. Attempted to jump start it and still nothing. Usually when I put the key in and turn it to the first position, the display comes on and I hear the ECU and other items boot. Now it is doing nothing.
I slowly went through the electrical system and found the main fuse attached to the starter relay, part 71602 (pic 1) blown. I figured replacing this fuse would fix my problem. It didn't. I then ordered a new starter relay thinking maybe that part had gone bad and caused the fuse to blow, but a new relay did not fix the problem.
I have found a work around for starting the machine. If I take one of the purple/black leads (pic 2) and insert one of them in the bottom right of the starter relay (pic 1 and 3) then the machine will get power even with the key in the off position. I'm bypassing something but don't know what. I can use my right hand to hold the wire against the lower right of the starter relay, reach over and hold the brake with my foot, then take my left hand and turn the key and it will crank. As soon as I remove the wire from the relay the machine shuts down. I have even removed the power distributor box and it will still get power when I touch the wire to the relay. Of course this is not the way it should work but if I can't solve this problem somehow I may just have to rig a connector to the relay and bypass whatever is causing the electrical issue. Massimo has told me the purple/black wires on my model are not used.
Any help in figuring what my problem may be or other items I can try?
v/r,
Rw
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By k-bo
My T-Boss 410 died hard on a run up the driveway and wouldn't restart. Cranks over fine, 12v at coil, fuel in cylinder (from plug check), and wire from computer to coil buzzes out OK. Computer threw a P0351 ignition coil malfunction message. I pulled the coil, measured resistance across the primary, and it was about 0.8 or 0.9 ohms, nominal for most ignition coils. I measured the secondary resistance as well and got about 6.5K ohms, also nominal for most coils. I checked the plug wire resistance and it was about 5000 ohms, which seems OK. And really perplexing, my spark tester shows spark. I got to feel it too, when I held my fingers too close to the conductor. 💩! Have any of you folks run across this?
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By Mrwright
So basically I can not find anywhere that has the buck 400efi parts has anyone had this issue
I have a 2019 buck 400 efi
I can find parts for a t boss 450 or 410
Or a buck 450 but a buck 400efi parts are no where !
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