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  1. J

    Water in the fuel

    I was called to the dock today to look at a 2017 Monterey that wouldn’t make power but start and idle okay. I automatically pulled the fuel filter and it was clogged with a pale slime and full of water so the engine mystery is solved but fuel filter only had 6 hours use. Where did all of the...
  2. J

    50hp EFI diaphragm fuel pump pressure

    I am sending the boat back today. The new mercury lift pump is putting out 3-4 psi which matches the old pump except for the needle on the gauge is steady now. I attempted to order a manual for this motor through ebay but it got cancelled an hour after I paid for it. The vendor’s canned excuse...
  3. J

    2006 merc 40 4 stroke

    I think buy a basic fuel injection test kit for ~$45 before spending $600 on a high pressure fuel pump that may or may not be needed. https://www.harborfreight.com/basic-fuel-injection-service-kit-64939.html
  4. J

    50hp EFI diaphragm fuel pump pressure

    The Yamaha F70 service manual.
  5. J

    2006 merc 40 4 stroke

    A cautionary tale about spark plugs. My Yamaha ran me in circles a couple of years ago. Plugs spark tested okay on the boat so I kept looking. I finally circled back to spark plugs but put them on a tester with a pressure chamber. One quit firing as soon as the pressure got to 5 psi. I spent...
  6. J

    2006 merc 40 4 stroke

    Idle control valve issues I have seen only affect idle. There is one on a 150 hp in the fleet I clean twice a season. Coils could be breaking down and causing problem when warmed up. Anything electrical can have heat related failures. Assuming it’s an EFI, the high pressure fuel pump comes...
  7. J

    50hp EFI diaphragm fuel pump pressure

    42 psi range would be for the high pressure pump sending fuel to the injectors. I am looking for the pressure going into the VST. It’s 19 psi on my 70HP Yamaha.
  8. J

    2006 merc 40 4 stroke

    Have you tried pumping the primer bulb to see if that brings power back?
  9. J

    50hp EFI diaphragm fuel pump pressure

    A friend asked me to look at his 2006 Mercury 50hp EFI. Motor runs okay as long as someone pumps the primer bulb every few minutes. I think I have the problem isolated to the diaphragm pump but would like to confirm how much fuel pressure it should be producing. I am seeing less than 4 psi on...
  10. J

    Service manual for 7.5 HP

    Thanks for the heads up.
  11. J

    Service manual for 7.5 HP

    Just parts to overhaul a carb, water pump parts and a throttle lever. Maybe a couple of other miscellaneous items. All available so far. I can probably get them at my local Mercury shop in Oklahoma but a lot of the time it is faster and more economical to order the stuff online. I have to look...
  12. J

    Service manual for 7.5 HP

    Thanks, knowing the year helps. There are several parts discontinued but it looks like iBoats has what I think I need to get it running. Still looking for a free manual but not a big deal if I have to order a Clymer or Seloc.
  13. J

    Service manual for 7.5 HP

    I don’t know if I would call it copper.
  14. J

    Service manual for 7.5 HP

    I’m looking for a service manual for a Mercury 7.5 Hp 2-stroke outboard. I have no idea how old this motor is. Mercury tells me the serial number isn’t valid which is making it difficult to know what parts to order. Serial number on the tag is 6431074. Someone lied to a buddy and told them I...
  15. J

    4.3 Mercruiser fuel supply issue

    There wasn’t any indication of internal damage when the belt stripped. The manual says the valves can hit the pistons if the timing isn’t correct. Stripped belt pretty much guarantees the timing being off. However, when the pulley broke, the seal on the other cam let go for some reason.
  16. J

    4.3 Mercruiser fuel supply issue

    This could be hull style, props and/or the driver’s knowledge but the manager and I somehow ended up crossing the lake at the same time last year. He was in a 270 HP Cobalt 200 (Volvo Penta) and I was in the Sea Ray 210 with a Mercury 150 HP EFI. I got on step faster and walked away from him for...
  17. J

    4.3 Mercruiser fuel supply issue

    We got the boat back from the shop. The bill was about $3700 for a fuel pump change. The engine work is done and lake tested but I still have to crawl in there to put the hull back together. Season is over so no rush.
  18. J

    5.0 GXi oil extraction

    I filled the boat with oil and returned the boat to the dock on November 2nd so the guy who winterizes the 6 I/O boats in the fleet could do whatever it is he does to get antifreeze throughout the motor while in the slip. The pictures helps. Now I have an idea what to look for. I didn’t expect...
  19. J

    5.0 GXi oil extraction

    I think the $2K inspection camera is only 640 pixels. Mine is anyway. I bought it to inspect aircraft cylinders years ago but I use it for nearly everything I when I have a need to see something in a tight space. The specific problem with getting the oil out was it kept sucking air whether...
  20. J

    5.0 GXi oil extraction

    Mirror and flashlight sounds easier to me. Especially since I don’t have a “stick” to hold my phone and the mirror has a telescopic handle so I don’t have to hang head low and stretch my arm down there hoping I get a picture of what I need.
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