cfauvel
Chief Petty Officer
- Joined
- Aug 16, 2005
- Messages
- 645
Probably smutz in the carbs or fuel pump problem, but here are the symptoms.
previous outing was on 9/2/2017 the day before we sent off youngest child back to college...great day..boat worked as what is the new normal...up on plane in about 4-5 seconds and WOT at 5800 rpm at 48mph.
Today the max rpm I got was 4000 rpm.
Started fine, and idled out of the dock area just fine.
mashed the throttle and it would NOT jump on plane....just leisurely get there. at one point it felt like it was starving for fuel so I change the tank being used to the rear tank( I have been having issue with the front tank with varnish granules clogging the fuel filter.)....Checked the racor fuel filter inlets and they are not clogged)
with the throttle all the way down, just wouldn't get pass 4000 rpm. So I had the wife squeeze the primer bulb, nothing real noticeable...if I added the choke (holding the key in) it would surge a bit higher, but not full to 5800 and wasn't consistent with the length I would hold down the key. Trying to describe the sound would be like this.....rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr WHAAAAAAArrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr rrrrrrrrrWHAAAAAArrrrrrrrrrrrrrrrrrrrrrrrrrrrr.... .the WHAAA would get up to 4000, and the rrrrr would be about 3600-3800
stopped at the sandbar and let everyone off to roam....Took out the plugs to inspect them and noticed something. All three on the starboard side were my typical black and wet electrodes and insulator. All three on the port side had an, unusual for me, dry dark brown color on the electrode and insulator.
Left a few hours later with the same symptoms, but couldn't get the WHAAA moments with squeezing the primer bulb and pushing in the key.
Got it home and started taking readings.
Compression Test ( throttle Wide Open and plugs in (wouldn't keep starter engaged with no plugs in) and warmed up)
PORT 102,104,110 (top, middle, bottom)
STBD 100,100,100
So we are good there.
Took out the plugs and re-measured the gaps, interesting considering I set them at .040 a while back.
Port .045, .045, .045
STBD .040, .045, .040
Put them all back to .040
tested the voltage from power packs to the coils (the orange wires) They are CDI units and the site states that they should be a minimum of 150v whilst running.
I had at idle
PORT 207, 206, 205
STBD 199, 201, 199
Tomorrow I'll test the stator resistance and voltage, but I think the stator is fine as the volts on the orange wires are above 150V.
The voltage regulator (not in play for ignition) is pretty new and giving the proper re-charge voltage to the battery and proper tach reading.
Magnets under flywheel are still glued in place and haven't moved.
I will try to squeeze in a test tomorrow post re-gap of plugs.
Thoughts?
previous outing was on 9/2/2017 the day before we sent off youngest child back to college...great day..boat worked as what is the new normal...up on plane in about 4-5 seconds and WOT at 5800 rpm at 48mph.
Today the max rpm I got was 4000 rpm.
Started fine, and idled out of the dock area just fine.
mashed the throttle and it would NOT jump on plane....just leisurely get there. at one point it felt like it was starving for fuel so I change the tank being used to the rear tank( I have been having issue with the front tank with varnish granules clogging the fuel filter.)....Checked the racor fuel filter inlets and they are not clogged)
with the throttle all the way down, just wouldn't get pass 4000 rpm. So I had the wife squeeze the primer bulb, nothing real noticeable...if I added the choke (holding the key in) it would surge a bit higher, but not full to 5800 and wasn't consistent with the length I would hold down the key. Trying to describe the sound would be like this.....rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr WHAAAAAAArrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr rrrrrrrrrWHAAAAAArrrrrrrrrrrrrrrrrrrrrrrrrrrrr.... .the WHAAA would get up to 4000, and the rrrrr would be about 3600-3800
stopped at the sandbar and let everyone off to roam....Took out the plugs to inspect them and noticed something. All three on the starboard side were my typical black and wet electrodes and insulator. All three on the port side had an, unusual for me, dry dark brown color on the electrode and insulator.
Left a few hours later with the same symptoms, but couldn't get the WHAAA moments with squeezing the primer bulb and pushing in the key.
Got it home and started taking readings.
Compression Test ( throttle Wide Open and plugs in (wouldn't keep starter engaged with no plugs in) and warmed up)
PORT 102,104,110 (top, middle, bottom)
STBD 100,100,100
So we are good there.
Took out the plugs and re-measured the gaps, interesting considering I set them at .040 a while back.
Port .045, .045, .045
STBD .040, .045, .040
Put them all back to .040
tested the voltage from power packs to the coils (the orange wires) They are CDI units and the site states that they should be a minimum of 150v whilst running.
I had at idle
PORT 207, 206, 205
STBD 199, 201, 199
Tomorrow I'll test the stator resistance and voltage, but I think the stator is fine as the volts on the orange wires are above 150V.
The voltage regulator (not in play for ignition) is pretty new and giving the proper re-charge voltage to the battery and proper tach reading.
Magnets under flywheel are still glued in place and haven't moved.
I will try to squeeze in a test tomorrow post re-gap of plugs.
Thoughts?
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