Cam Orientation

[Bigrider]

I recently replaced the head gasket. I took note of the orientation of the cam lines on the right side of the engine, white mark facing front, but failed to note if the engine was in compression or exhaust mode. I then inadvertently moved the crank to attach the cam chain. Now when I try to start, it cranks but won't start. Don't know if I have the cam 180% off or just a carb problem. Question. With the engine at TDC on compress stroke, which way should the white mark on the cam be facing (front or rear)? Also, I tried hand turning the crank to see when the spark plug fired but it only fires when I use the electric start. Is there a method using a pencil light probe to check when the circuit is firing. This would also help me understand which way to orient the cam. Thanks for any help
Dave H
San Antonio, TX

[raul10141964]

If you set the crank an the cam marks by the service manual will be correct

[Bigrider]

If I read, and remember correctly, the manual states putting the engine at TDC with the white mark facing the intake side. It didn't state whether the engine was on compression or exhaust. I would assume it would be on compression, but as stated the engine won't start so I just want to verify it needed to be "on compression".
Dave H

[Water Warrior 2]

If memory serves me correctly TDC refers to the compression stroke.

Did you prime the carb before trying to start the bike? Just a thought.

[raul10141964]

TDC (top dead center) refers to the position of the piston, the engine reach TDC on compression stroke an on exhaust stroke.
if you set the timing marks correctly the came time will bi OK

[Water Warrior 2]

TDC (top dead center) refers to the position of the piston, the engine reach TDC on compression stroke an on exhaust stroke.
if you set the timing marks correctly the came time will bi OK

To set the timing I believe the engine should be at the top of a compression stroke.

[raul10141964]

if the crank is on TDC and the cam is on it's timing mark, is the compression stroke

[Goose51683]

Water warrior- prime the carberator? Is that as simple as turning the fuel selector to prime? I only ask cause I had this same problem last year and never did get it fixed.

[Water Warrior 2]

Water warrior- prime the carberator? Is that as simple as turning the fuel selector to prime? I only ask cause I had this same problem last year and never did get it fixed.

Yup, just turn the lever to Prime for 10 or 15 seconds then back to Run.

[jonathan180iq]

Yeah. Just filling the float bowl a bit so there's something for the carb to use.

[Bigrider]

Per Water Warrior 2, I primed and tried the start, and no real indication that I'm getting any kind of ignition. I checked and have spark. Two more things to check are changing the gas to new (its been sitting awhile) and getting a new spark plug. Worse case, how do I check to see if I put the cam in 180% off? As stated earlier, the cam marks are in the right orientation at TDC, but they look that way on intake too. There is a white mark and it is facing the intake side. Is that where it is supposed to be?
/r
Dave H
San Antonio, TX

[Water Warrior 2]

I have no more ideas. Some one with more experience will be along shortly. I can honestly say we never had an issue with Lynda's GZ in 3 years which leaves me with no actual hands on experience. I suppose that is a good thing.

[raul10141964]

this is the page of the manual that you need

[mainlinecoffee]

Did you loosen the cam chain tensioner when you set the cam and chain? If you don't it will throw it off. If it gets spark you can get a rough guess by pulling the carb and shooting starter fluid straight in the hole.

[mainlinecoffee]

If it's off by less than thirty degrees than it should atleast spit sputter or backfire.

[Water Warrior 2]

this is the page of the manual that you need

This should be a "Sticky".