canadaduane
29.04.2021 8:02:22
Re: 1999 johnson 90 hp fuel problem.
See full version: 1999 johnson 90 hp fuel problem
Re: 1999 johnson 90 hp fuel problem.
Re: 1999 johnson 90 hp fuel problem.
Does it starve on the portable tank. Did you check/change the pulse limiter? Replace the fuel line from the filter cover to the plastic inlets and see if you have air appear in line,if so check/replace the plastic inlet for the fuel/oil as I have seen these cracked and they will suck air but wont leak under pressure. the inlet is part #61,pulse fitting is #5 and the hose is #81.
Wondering
"Where-'n-'Ell"
to get great parts for your outboard?
Meet the MasterTech!
(click picture) [links]
A Fun Old Porcelain Sign and Ancient Tools here
Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store.
If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. [links]
If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. here
Completing the CAPTCHA proves you are a human and gives you temporary access to the web property.
Cloudflare Ray ID: 687568a1db42163a • Your IP : 46.32.66.208 • Performance & security by Cloudflare here
[links]
Sounds to me like your fuel pump is not working. Which is probably why the previous owner installed that 5psi priming pump.
Check the fitting on fuel tank, if its made of aluminum its a anti-siphon valve..replace it with a brass one. It sounds like a fuel restriction and the pump is adding extra fuel. Has the boat set before purchase? Check the fuel pressure from VRO pump, use a inline pressure guage. Start and set idle @ 850 rpms and check pressure, it should not fall below 3psi..if it does its a faulty VRO or the pulse fitting is obstructed.. [links]
When you bypass the VRO, where do you connect the fuel line that comes from your gas tank? If it is connected directly to the fuel line T connection that runs to your carbs, you have bypassed your fuel pump along with the VRO. here
I tried looking for kinks in the line and also leaks everything looks good what next ? guessing check the high speed jets ? if i pump the bulb when it starts to act fuel starved it picks right back up , what else could it be?
Re: 1999 90hp johnson problem. here
still can't figure this one out . I have checked all of the hoses , the tank, all fittings ,I even tried to run it on a portable tank and it still does the same thing . I even changed the pulse limiter fitting . guess the next thing would be to check float height to see if they are correct. surely this is not a block problem, the compression is near factory. any other ideas. [links]