MondaySux
New member
- Messages
- 5
- Reaction score
- 2
Hear me out... Duromax 420cc Stage 1 Gov Delete.
Just got finished pulling out the original piston. The reason is that the engine just does not turn on. It is still new, maybe 2 hours on it, but it sat for about a year. Turned it on a few times within the year now, no start...
Did all this (not in this order): I have spark and all. Cleaned flywheel, new ingition coil, adjusted valve lash. It was just about perfect, though. Repositioned air gap on coil to .30. Already had a racing spark plug. Compression test. No leaks. Valves are PERFECT, rods are PERFECT, cam lobes PERFECT!! Failed to start w/ starter fluid and no carb. Redid wiring. Gave up on stock carb. Got it a brand new REAL Mikuni 38mm round slide for it to get rid of that old janky pos stock carb. All that.
I tried everything you can think of. When I took the head off, the cylinder walls looked and felt very bad!! Maybe from water even though it was covered. Engine was seized but I unseized it with pb blaster/mystery oil and thought maybe I ruined the piston rings except that it held compression like a champ, even the intake sucks in so much air it would suck you in like a typhoon.
Anyways I removed the piston (it's just about as great condition as new and rings too. I cleaned the whole thing) and got a new flathead 90mm piston. I honed the cylinder walls with a huge 4-inch hone but only did a comfortable amount of honing to clean out the walls. Now they are smooth but still stained.
The new piston goes in, gapped the rings, and it is so dang hard to turn! I can't turn it without it being a workout, and it makes scraping sounds. I use driver pulley form torque converter and it sounds horrible. Removed piston, all good with no scoring and still all lubed up and no damage to new piston and rings.
I ditched the new piston and used the original. All good. I though "ehh" on higher conpression.
I'm almost getting ready to get rid of this engine and scrap it for a new one though. Cant believe it's brand new and doesn't start. Although the parts I got for it can be used for another engine. I'm getting tired of it. It ran great woth a Stage 1. That's all it ever ran actually? How or why would it all of a sudden be a timing will beat me? Thanks in advanced guys.
Just got finished pulling out the original piston. The reason is that the engine just does not turn on. It is still new, maybe 2 hours on it, but it sat for about a year. Turned it on a few times within the year now, no start...
Did all this (not in this order): I have spark and all. Cleaned flywheel, new ingition coil, adjusted valve lash. It was just about perfect, though. Repositioned air gap on coil to .30. Already had a racing spark plug. Compression test. No leaks. Valves are PERFECT, rods are PERFECT, cam lobes PERFECT!! Failed to start w/ starter fluid and no carb. Redid wiring. Gave up on stock carb. Got it a brand new REAL Mikuni 38mm round slide for it to get rid of that old janky pos stock carb. All that.
I tried everything you can think of. When I took the head off, the cylinder walls looked and felt very bad!! Maybe from water even though it was covered. Engine was seized but I unseized it with pb blaster/mystery oil and thought maybe I ruined the piston rings except that it held compression like a champ, even the intake sucks in so much air it would suck you in like a typhoon.
Anyways I removed the piston (it's just about as great condition as new and rings too. I cleaned the whole thing) and got a new flathead 90mm piston. I honed the cylinder walls with a huge 4-inch hone but only did a comfortable amount of honing to clean out the walls. Now they are smooth but still stained.
The new piston goes in, gapped the rings, and it is so dang hard to turn! I can't turn it without it being a workout, and it makes scraping sounds. I use driver pulley form torque converter and it sounds horrible. Removed piston, all good with no scoring and still all lubed up and no damage to new piston and rings.
I ditched the new piston and used the original. All good. I though "ehh" on higher conpression.
I'm almost getting ready to get rid of this engine and scrap it for a new one though. Cant believe it's brand new and doesn't start. Although the parts I got for it can be used for another engine. I'm getting tired of it. It ran great woth a Stage 1. That's all it ever ran actually? How or why would it all of a sudden be a timing will beat me? Thanks in advanced guys.