DoktorC
Member
Those are cool!! I love cutaways.
The engine I have in my SXR is actually the very first 98 engine produced...8CH-00001..there's something you don't see every day
.
The engine I have in my SXR is actually the very first 98 engine produced...8CH-00001..there's something you don't see every day
.
mine is 8du-000040
98srx6
New member
DoktorC said:Those are cool!! I love cutaways.
The engine I have in my SXR is actually the very first 98 engine produced...8CH-00001..there's something you don't see every day
You got one before their tooling started to wear out, should be built right to spec.
what is the meaning of the 8du/8ch the year & month it was made?
on the sx engine where is the weep hole everyone is talking about that leaks?
DoktorC
Member
The weep hole is under the waterpump...8ch and 8du are different model years. 8ch may be 97..I don't remember...but my engine does have the wide end bearing of the 98s.
blueblooded
Member
Not a cut awat but i still like looking at it....
seanmurphy26
New member
ya those cut aways are cool...ill look and see what number i have
DoktorC
Member
On further inspection..It's 8dn-000001 (I'm an idiot...). I'd guess that Red's is an 8dn...it kinda looks like a U but the 98 suffix is 8dn..so it would make sense. The sled it came out of was #8...I just couldn't let my motor sell with the sled.
Ok, on the srx motor, It looks like the power valve is into the cylinder. Can someone explain to me the theory/how they operate? Seems to me they should never be in the cylinder. Is the valve suppose to be open at wot or below idle (when adj are made it should be open right? 
). If they are out of adjustment can they hit the piston? 
Thanks for any info.
). If they are out of adjustment can they hit the piston? Thanks for any info.
DoktorC
Member
Quick explaination goes like this: The powervalve allows for more agressive top end porting. It is closed at a normal idle and through to about 6800 rpm, making the exhaust ports smaller allowing the engine to behave nicely. Once above 6800 the powervalve open allowing for more high rpm power (someone else can go deeper if you want). They also open when your idle drops below 800 rpm...I'm not sure if that is to help keep the engine running or just allowing people without the tool to set their valves.
The design of the PV is such that it should never be able to contact the piston. I know that is not the case in the watercraft engine..mine were 1/8 inch shorter then they should have been because of contact. There is a collar built into the valve with stops the valves from falling into the cylinder. This collar was worn on my PWC from incorrect adjustment...
The design of the PV is such that it should never be able to contact the piston. I know that is not the case in the watercraft engine..mine were 1/8 inch shorter then they should have been because of contact. There is a collar built into the valve with stops the valves from falling into the cylinder. This collar was worn on my PWC from incorrect adjustment...
Dok,
Thank you very much.
Rich
Thank you very much.
Rich
yamaholic22
Active member
8DN is the prefix of everything on the srx models, 8CH is the prefix on all SX chassis, 8CR's are the vmax's in the proaction chassis, 8BU is the vmax 4, 89L is the exciters, etc
PhatboyC
New member
Just though I would bump this thread. First time I see a cut away for these engines. Pretty cool.