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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

    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...
  3. 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...
  4. J

    5.0 GXi oil extraction

    I checked the oil level before attempting extracting the oil. The dipstick showed full but I am sucking air. I have only managed to remove about 2.5 quarts after an hour last night while the oil was warm and 2 hours this morning with the oil about 50 degrees. I am using a hand pump vacuum...
  5. J

    4.3 Mercruiser fuel supply issue

    Working one that started out as a “won’t start” on the lake but checked good at the dock after it was towed evolve into “won’t start” after fuel filter change. I installed a primer bulb and it started fine after pumping it up. Power starts dropping off after a minute or so and eventually gets to...
  6. J

    Yamaha F150 overhauls?

    Are there any known good shops rebuilding Yamaha F150 power heads? Had a rental take a hit from behind hard enough to lockup a cam and strip the belt. One or two outings after changing the belt, the pulley on the other cam broke creating a kickback hard enough to remove the flywheel nut and take...
  7. J

    2018 Mercury 150 EFI hard to start hot

    Motor has been running great and starts easy cold but go for a restart after it is warmed up and it repeatedly fires and dies. I don’t see anything in the service manual covering the issue. It can be started by giving it a little throttle but something isn’t right for that to be a requirement...
  8. J

    Fuel use meter?

    I need some way, other than leaving full and refilling when I return, to find out how much fuel is used on each outing. I know about FloScan and it is a nice, across the board fix but it is a little pricey for me. It seems to me that with everything on the modern engines being computer...
  9. J

    Any lower unit experts?

    I just opened up the lower unit on a Suzuki DF200A and found a mess. The prop and housing appear undamaged and the prop shaft is straight. Any ideas why it would strip out like this? The lower unit was brand new last fall.
  10. J

    V8-270-C-B Exhaust bellows (hose) replacement

    I have a leaking exhaust bellows between the left elbow and the Y-pipe. A local shop recommended changing it but didn't offer any tips on how. I slid the bellows down the Y-pipe thinking there may be a gap to work it off the pipe and install a new one but there only appears to be a 1/2 inch or...
  11. J

    Suzuki lower units

    Is there an alternate source for Suzuki lower units? I ordered one 5 weeks ago that FedEx or one their contractors appears to have lost. Can’t pay another $3800 even if Suzuki has gotten another in stock. Mercury, Yamaha and OEM can be sourced through SEI but I haven’t come across anything for...
  12. J

    Uncommanded tilt up

    The motor is a 2015 Mercury 150 HP 4-stroke. It started going full up on it’s own a couple of weekends ago. When I was called to the boat I used the throttle to trim it all the way down but it came all the way back up as soon as I released the switch. I then used the switch on the motor and it...
  13. J

    Fuel coming out VST vent hose

    This is a generic engine question prompted by a Suzuki DF250. The VST vent is pumping raw fuel into the air intake which in turn floods out the engine. I know there is a VST issue and have one ordered but the boat is on the lake 3 miles from the nearest boat ramp and swapping out a VST is not...
  14. J

    Is it feasible to straighten a prop shaft?

    The title says it all. Brand new lower unit in July that a renter bent the shaft on in September. Have had the lower unit disassembled and sitting on the bench ever since waiting for a shaft that I can’t even get a status on. Stainless prop doesn’t show any impact damage. I have seen some...
  15. J

    Yamaha F150 tilt/trim limiter

    I bought one of these limit switches today and took a quick look at the boat to see what the installation will take. The switch mounts easy enough but I didn’t see where to plug in the wires. I followed the harness from the trim switch on the side across the bottom of the cowl to the main...
  16. J

    Pontoon parts?

    I have a 2013 Silver Wave in the fleet I manage. Very nice boat but one of the users let a tube blow out hit and the rear gate. The gate went to the bottom of the lake and now I cannot find a replacement anywhere. Silver Wave doesn't support anything more than 6 years old. I only found one fence...
  17. J

    Engine alarm won’t stop

    I have a 2015 Volvo Penta V8 275 that we can’t get the check engine alarm to quit. The previous manager hauled it to the shop where they said it is throwing a misfire code. They changed the spark plugs and sent it back but the alarm still sounds. Reports from the renters is that the alarm varies...
  18. J

    Suzuki DF250S pumping fuel into air intake

    I am a mechanic by trade but new to boats. Most things I work on are not fuel injected either. The other day I towed in a rental boat that wouldn't run. The driver said they were just idling around when it died. I couldn't get the primer bulb to pump up so I assumed an air leak somewhere. Two...
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