1979SeaRay
Cadet
- Joined
- Jul 31, 2005
- Messages
- 14
I have the Mercruiser 898 which is the Chevy 305 V8. It is a fishing vessel for me and I do a lot of trolling at low speeds, under 2mph. When trolling it is usually running for round an hour or so at a time until I pick up and open her up at WOT.
I have had problems in the past after trolling for a long periods of time where at WOT the motor would sort of bog down and I would have to let off the throttle for a little while. THen after 5-10 min of running at higher RPMs it seemed as if it cleaned itself out and ran fine. I always assumed this was just some carbon build up from running at such low RPMs for a long time and it would burn off.
Yesterday, after trolling for and hour or two, the boat stalled as we were in the middle of a troll. She started right back up in neutral but as soon as I tried to put her in gear it would stall. After a stall I would get a hard start and had to open the throttle up in neutral in order to restart. Once started it ran fine in neutral but as soon as I put it into drive, stall. It sounded like it was puking on fuel. I could smell fuel and it backfired once.
I finally got it into gear but could not get it past 8 mph. I had to drive the 9 miles to the dock at 8mph. I checked all fuel lines for blockage or leaks and found none. I also emptied and changed the fuel water seperator. No water in the filter. The carb was rebuilt this spring and I just put new plugs and ran a bottle of Sea Foam through the tank last weekend. I fished last weekend and she never ran better. I really thought the Sea Foam and plugs made a big difference.
Do you think this is electrical or fuel related? I hve seen Dons fuel pressure test but am not sure exactly were to instal the new fuel line and where to hook up the guage. From the tank to the filter? Filter to the pump? pump to Carb?
BTW it has an electronic ignition and two seasons ago it was completely replaced along with new cap, rotor plugs and wires.
I have had problems in the past after trolling for a long periods of time where at WOT the motor would sort of bog down and I would have to let off the throttle for a little while. THen after 5-10 min of running at higher RPMs it seemed as if it cleaned itself out and ran fine. I always assumed this was just some carbon build up from running at such low RPMs for a long time and it would burn off.
Yesterday, after trolling for and hour or two, the boat stalled as we were in the middle of a troll. She started right back up in neutral but as soon as I tried to put her in gear it would stall. After a stall I would get a hard start and had to open the throttle up in neutral in order to restart. Once started it ran fine in neutral but as soon as I put it into drive, stall. It sounded like it was puking on fuel. I could smell fuel and it backfired once.
I finally got it into gear but could not get it past 8 mph. I had to drive the 9 miles to the dock at 8mph. I checked all fuel lines for blockage or leaks and found none. I also emptied and changed the fuel water seperator. No water in the filter. The carb was rebuilt this spring and I just put new plugs and ran a bottle of Sea Foam through the tank last weekend. I fished last weekend and she never ran better. I really thought the Sea Foam and plugs made a big difference.
Do you think this is electrical or fuel related? I hve seen Dons fuel pressure test but am not sure exactly were to instal the new fuel line and where to hook up the guage. From the tank to the filter? Filter to the pump? pump to Carb?
BTW it has an electronic ignition and two seasons ago it was completely replaced along with new cap, rotor plugs and wires.
