newbie4life
Chief Petty Officer
- Joined
- Jul 19, 2007
- Messages
- 410
Ugh. I had the whole thing typed out, and with one stroke of a key, the sucker's gone. Here goes again:
1984 Yamaha 40 ELN 2 stroke -- bought it last year, hadn't run for nearly 15 years. Took the carbs off, rebuilt, all new fuel lines inside the engine housing, new impeller, new fuel filter and housing, new fuel line and bulb from tank to engine, drain and fill the lower unit, etc. Ran great last year, nearly 15 mph which, on a pontoon, is not terrible for this setup.
This year, I'm getting closer to 10 mph.
Pulled the carbs, cleaned (not much in them, but some), put back together, went on the water, no change. Brought to my 82 year old buddy who is something else when it comes to engines... he tested the coils, and one was bad. Ordered online, replaced, took to the water, maybe a hair better, but still not getting higher rpms like I remember last year (no tachometer -- this pontoon has no frills -- lucky to have a steering wheel.) and kind of stumbles a little bit in the lower rpms. In fact, for the first time ever yesterday, it started and died. Just had to work to keep it running a little until it warmed up.
I noticed yesterday that the fitting on the gas tank/line doesnt fit as tight as I think it should - seems a little loose? Primer bulb doesn't seem to get good and firm like I remembered last year -- it's a new fuel line and bulb last year, but... I suppose it could go bad, huh?
As I said before, this pontoon had no frills -- not even power tilt. This spring, I started parting out an old OMC drive, and took the new trim/tilt pump and a cylinder, and modified it to work on this thing... Works well -- but I'm wondering if part of the hydraulic cylinder sticking below (maybe an inch or so) the engine pod would cause enough turbulence that the prop isn't getting good clean water??? But wouldn't that raise the rpms instead of lowering them? And, that wouldn't make a difference in the lower rpms anyway...
Any other ideas?
Thanks guys,
Jason
1984 Yamaha 40 ELN 2 stroke -- bought it last year, hadn't run for nearly 15 years. Took the carbs off, rebuilt, all new fuel lines inside the engine housing, new impeller, new fuel filter and housing, new fuel line and bulb from tank to engine, drain and fill the lower unit, etc. Ran great last year, nearly 15 mph which, on a pontoon, is not terrible for this setup.
This year, I'm getting closer to 10 mph.
Pulled the carbs, cleaned (not much in them, but some), put back together, went on the water, no change. Brought to my 82 year old buddy who is something else when it comes to engines... he tested the coils, and one was bad. Ordered online, replaced, took to the water, maybe a hair better, but still not getting higher rpms like I remember last year (no tachometer -- this pontoon has no frills -- lucky to have a steering wheel.) and kind of stumbles a little bit in the lower rpms. In fact, for the first time ever yesterday, it started and died. Just had to work to keep it running a little until it warmed up.
I noticed yesterday that the fitting on the gas tank/line doesnt fit as tight as I think it should - seems a little loose? Primer bulb doesn't seem to get good and firm like I remembered last year -- it's a new fuel line and bulb last year, but... I suppose it could go bad, huh?
As I said before, this pontoon had no frills -- not even power tilt. This spring, I started parting out an old OMC drive, and took the new trim/tilt pump and a cylinder, and modified it to work on this thing... Works well -- but I'm wondering if part of the hydraulic cylinder sticking below (maybe an inch or so) the engine pod would cause enough turbulence that the prop isn't getting good clean water??? But wouldn't that raise the rpms instead of lowering them? And, that wouldn't make a difference in the lower rpms anyway...
Any other ideas?
Thanks guys,
Jason