1998 40hp Yamaha 2 stroke, 1cyl at 50psi

[SaltH2OHokie]

Truck is the mechanical project this weekend, dropping the transmission to replace the ring gear on a 4 month old flywheel. That's exciting on any vehicle, but what really makes it fun on my truck (diesel f350) is that everything weighs about 3 times what it does on a normal passenger vehicle...but I'll keep fiddling with this motor in the evenings, assuming some giant ford part doesn't smoosh me this weekend. I'll post pictures and surely have questions.

[seabob4]

Truck is the mechanical project this weekend, dropping the transmission to replace the ring gear on a 4 month old flywheel. That's exciting on any vehicle, but what really makes it fun on my truck (diesel f350) is that everything weighs about 3 times what it does on a normal passenger vehicle...but I'll keep fiddling with this motor in the evenings, assuming some giant ford part doesn't smoosh me this weekend. I'll post pictures and surely have questions.

Not good, not good...

[fitz73222]

Truck is the mechanical project this weekend, dropping the transmission to replace the ring gear on a 4 month old flywheel. That's exciting on any vehicle, but what really makes it fun on my truck (diesel f350) is that everything weighs about 3 times what it does on a normal passenger vehicle...but I'll keep fiddling with this motor in the evenings, assuming some giant ford part doesn't smoosh me this weekend. I'll post pictures and surely have questions.

Sounds like a bendix problem or the starter needs shimming if it trashed a ring gear that fast. There is some heavy parts on those trucks! Thats why the thing weighs like 8600#.

[SaltH2OHokie]

The starter on these doesn't shim (according to my buddy)...regardless, I have a new starter just to eliminate that as the problem. My 2 best friends are both diesel mechanics, but one works on International 444's fairly often (which is my 7.3 with a few better parts, to hear him tell it).  He said he has no explanation, but said he'd figure with new ringgear and new starter, I'll cure it, whatever it was.

For now, I've learned to find hills to park on (which isn't so easy when you live in an area that's darn near completely devoid of hills) so that if the motor lands on that magical spot, I can just clutch it, let it roll and dump the clutch.  Even a slight incline burps the motor just enough usually to get the flywheel around to some good teeth.

Just got a rebuilt driveshaft today (turns out, if you let a u joint go long enough, it eats the living poo poo out of your yoke)...big weekend of wrenching ahead.  

As to the weight, mine's crew cab, longbed, 4x4 and I usually tare out around 8,300lb with just me in the truck, so you're pretty close.  All that weight, a foot made of lead, 35" 10ply tires and I still see 15+mpg.  

[seabob4]

I can tell you about u-joints and yokes on my old Volvo turbo wagon...    

Drive shaft survived, though!!  

[SaltH2OHokie]

Truck is the mechanical project this weekend, dropping the transmission to replace the ring gear on a 4 month old flywheel. That's exciting on any vehicle, but what really makes it fun on my truck (diesel f350) is that everything weighs about 3 times what it does on a normal passenger vehicle...but I'll keep fiddling with this motor in the evenings, assuming some giant ford part doesn't smoosh me this weekend. I'll post pictures and surely have questions.

Not good, not good...

All the heavy stuff is off and back on and my only injury is a crushed/bloodied pinkie fingernail, which hilariously enough happened on the first bolt...didn't even get the starter off and I was bleeding and cussing...

Ring gear had one tooth completely gone, two 90% gone and some beyond those with beginnings of extra wear. Knocked it right off with a punch/machinists hammer, heated new one for about five minutes with a torch, picked it up with welding gloves and dropped it right on the flywheel. Seems crazy that holds against the compression of that big diesel motor but (hopefully) it does.

My help had to leave at 9, but tranny and xfer case are back on, so I should be able to handle the rest.