Hello,
I installed the new anti-siphon valve and dip/ pickup tube and ran at idle.
I get 6.5 PSI now just before the carburetor, as opposed to 4.3 PSI at idle with the old anti-siphon valve. The temperature was 72F when that was done. With the new ignition coil, I am only seeing blue in the...
Installing the new anti-siphon valve tonight, re-testing fuel pressure and spark color.
One guy on Reddit had similar loss of power on the water past 3K RPM, after coming out of Winter storage.
His deduction was:......" Spiders built a nest in your vent tube".
I supposed I can shoot some...
Since installing the new ignition coil, I have not checked color with the spark gap tool. I can do that on all 4 cylinders again, as soon as the new dip tube and anti-siphon valve are installed a a day or two. Thanks....
I don't have an easy/safe way to stick my head in the engine compartment while the engine is WOT on the water and check the timing being that close to the belts.
The timing checked out fine when running on muffs. It was in "base-timing" mode with the extra jumper connected, and other wires...
I was able to get the dip tube out by soaking the threads in a mixture of 2 parts acetone, 1 part brake cleaner, and 1 part red ATF.
Some brute force, and it finally let loose.
I was able to recover the spring from the anti-siphon valve in the bottom of the bilge, but I never did find the...
Good news is that the flapper is 100% intact.
I was able to open the rubber coupler enough to look down inside and see it. As to how pliable it is , - I put a blank arrow down there and one of the rubber flaps moved, so I think that it is pliable enough.
Bad news is that the anti-siphon valve...
Alright Lou, Thank you. I will let the boot area soak in silicone spray overnight. Even if I can get a 10mm opening between the rubber boot and the cast iron, I can slip my boroscope camera down there and check out the flapper. Thanks.
This was all performed while the engine was running on muffs in the garage. As for getting out on the lake, I might, have one weekend left, sadly.....the temps are getting into the 50's now, and getting close to winterizing the engine either way.
The pressure showing on the inline gauge did drop as the throttle was increased. It was idling at like 4.5 PSI, then at double the throttle, the PSI went down to 4.2 PSI closer to 3000 RPM.
Anti-Siphon Valve - What am I checking for here, the valve with the green marker line on it? Checking it...
Someone here mentioned that I would have to take the exhaust manifold off then (replace the gasket) to check to see if the flapper was in place. When you say, "missing and blocking the exhaust", do you mean that it might have overheated, crumbled, fallen down the exhaust and it remains are now...
Hello I just measured the resistance of the ignition wires / spark plug wires using a digital voltmeter sent to 40K Ohms.
Compared to the wires I replaced these are reading 2.03, and the older wires are 4.07, I believe they are well within spec, showing less resistance.
Hi Guys,
I ended up replacing the ignition coil, since it was just two bolts, easy to get to, and not all that expensive. The motor fired right up, as it did before, ran it for two minutes at idle, bumped the throttle up to 2K RPM's and back down. It might have been slightly smoother than before...
