Hello fellow Afourians. I truly enjoy reading though the many threads on this site and feel my knowledge has improved immensely from your suggestions. To get to the point, I likely brought this problem upon myself but after a long layup I am in possesion of an A4 unable to start. Apologies for the long-winded description to follow...
Background:
Due to COVID 19 did not launch in Spring 2020. Thus boat (Northern 29 1977) was in disuse between Oct 2019 (haulout) and June 2021 (launch) being 1.5yrs. During layover I replaced the Keyed+Pushbutton starting mechanisms with a 3-pos keyswitch. Why?, because some years ago the key broke off in the switch and I hotwired/bypassed it, requiring batt selector (1,2,both,off)be switched to one of the 2 batts then pushing the start button. I didn't like this kludge so decided to normalize it. After the install I verified that the starter would try to turn over the engine but I never went further to verify that the engine would actually start. Therefore the engine was never run over the layover period. My bad.
Winterizing was as per usual for past 10 seasons (plumbers antifreeze plus pull drain plugs), oil in plug holes, etc)
Before launch this spring I tried unsuccessfully many times to start up. Always while attempting starting water intake shut off as widely advised.
Symptoms:
When key is switched to Start there is the usual sound coming from the starting motor and I'd descibe the starting as 95% complete. It just won't turn over. With 1-2oz fresh gas poured into arrestor, full choke (verified at carb throat)and 1/4 throttle with switch held on Start there is a fast "hrump-hrump" sound of exhaust pressure, like motor is on verge of running, and with some smoke. I hold this for up to 5-10sec then when key is released back to ON all starting attempt stops. Key turned back to OFF ASAP. As mentioned besides being idle for 1.5 yrs the only change made was the key switch so I retraced all the wiring to/from it and compared with wiring diagrams published on this website. Nothing obviously wrong stands out. So I focused on the main ingredients of successful starting, namely fuel, spark, and compression not only to solve the starting problem but improve the overall environment
Other notes:
- Oil looked clean. No discolouration or smell of gas or evidence of water
Actions Taken:
a) SPARK
-Centre wire from dist placed near block. Switch on using remote starter. Spark at least 1" seen. Cannot distinguish if yellow or blue. With each plug removed and on its wire also see sparks to ground on all 4. Plugs looked good but replaced with new anyway.
-EI is installed (no points). Inspected dist cap, looked a bit dirty on all contacts and rotor contact, so cleaned. Replaced with new dist cap (
NAPA RR181 Distributor Cap). Made no diff
-EI module led flashes as usual and rotor(?) inside dist rotates when starting
-Spark plug wires all <1Kohms resistance (ok?)
-Solenoid "S" post to ground approx 2ohms
-coil voltage drops slightly from 13v 11.5v when starting
-Short batt post on solenoid to "S" term with screwdriver gives possibly stronger start attempt but no start. Remote starter connects same way.
b) COMPRESSION
-pressure gauge on start attempt approx 60psi all cyl. Cannot hold thumb on plug holes while cranking.
-poured a few oz MM Oil into each cyl on several occasions
-whacked solenoid and starter with piece of wood while starting
c) FUEL
- New fuel pump installed (477060 FACET GOLD-FLO FUEL PUMP)
-Carb removed, cleaned and rebuilt using MM kit (gaskets, main needle)
- OPSS bypassed to ensure fuel pump received 12v
- Used gerry can with fresh fuel to pump via short hose
-Inline filter inspected/cleaned (gas tank-pump-filter-carb)
-No gas seen in carb throat. Good suction at throat while cranking.
- When carb bolts loosened evidence of some gas seen on gasket to intake manifold
- Could not determine if smell of gas on the plugs
- Fuel tank drained of old gas and soaked in Methyl hydrate hoping to clean any remaining junk. Not using tank for troubleshooting.
Next Steps
- Am about to consider removal of solenoid/starter for inspection, possibly replace solenoid
- Already booked appt with mechanic from the marina for assistance.
Thanks for your time and appreciate any input!
Thanks
Donc
Background:
Due to COVID 19 did not launch in Spring 2020. Thus boat (Northern 29 1977) was in disuse between Oct 2019 (haulout) and June 2021 (launch) being 1.5yrs. During layover I replaced the Keyed+Pushbutton starting mechanisms with a 3-pos keyswitch. Why?, because some years ago the key broke off in the switch and I hotwired/bypassed it, requiring batt selector (1,2,both,off)be switched to one of the 2 batts then pushing the start button. I didn't like this kludge so decided to normalize it. After the install I verified that the starter would try to turn over the engine but I never went further to verify that the engine would actually start. Therefore the engine was never run over the layover period. My bad.
Winterizing was as per usual for past 10 seasons (plumbers antifreeze plus pull drain plugs), oil in plug holes, etc)
Before launch this spring I tried unsuccessfully many times to start up. Always while attempting starting water intake shut off as widely advised.
Symptoms:
When key is switched to Start there is the usual sound coming from the starting motor and I'd descibe the starting as 95% complete. It just won't turn over. With 1-2oz fresh gas poured into arrestor, full choke (verified at carb throat)and 1/4 throttle with switch held on Start there is a fast "hrump-hrump" sound of exhaust pressure, like motor is on verge of running, and with some smoke. I hold this for up to 5-10sec then when key is released back to ON all starting attempt stops. Key turned back to OFF ASAP. As mentioned besides being idle for 1.5 yrs the only change made was the key switch so I retraced all the wiring to/from it and compared with wiring diagrams published on this website. Nothing obviously wrong stands out. So I focused on the main ingredients of successful starting, namely fuel, spark, and compression not only to solve the starting problem but improve the overall environment
Other notes:
- Oil looked clean. No discolouration or smell of gas or evidence of water
Actions Taken:
a) SPARK
-Centre wire from dist placed near block. Switch on using remote starter. Spark at least 1" seen. Cannot distinguish if yellow or blue. With each plug removed and on its wire also see sparks to ground on all 4. Plugs looked good but replaced with new anyway.
-EI is installed (no points). Inspected dist cap, looked a bit dirty on all contacts and rotor contact, so cleaned. Replaced with new dist cap (
NAPA RR181 Distributor Cap). Made no diff
-EI module led flashes as usual and rotor(?) inside dist rotates when starting
-Spark plug wires all <1Kohms resistance (ok?)
-Solenoid "S" post to ground approx 2ohms
-coil voltage drops slightly from 13v 11.5v when starting
-Short batt post on solenoid to "S" term with screwdriver gives possibly stronger start attempt but no start. Remote starter connects same way.
b) COMPRESSION
-pressure gauge on start attempt approx 60psi all cyl. Cannot hold thumb on plug holes while cranking.
-poured a few oz MM Oil into each cyl on several occasions
-whacked solenoid and starter with piece of wood while starting
c) FUEL
- New fuel pump installed (477060 FACET GOLD-FLO FUEL PUMP)
-Carb removed, cleaned and rebuilt using MM kit (gaskets, main needle)
- OPSS bypassed to ensure fuel pump received 12v
- Used gerry can with fresh fuel to pump via short hose
-Inline filter inspected/cleaned (gas tank-pump-filter-carb)
-No gas seen in carb throat. Good suction at throat while cranking.
- When carb bolts loosened evidence of some gas seen on gasket to intake manifold
- Could not determine if smell of gas on the plugs
- Fuel tank drained of old gas and soaked in Methyl hydrate hoping to clean any remaining junk. Not using tank for troubleshooting.
Next Steps
- Am about to consider removal of solenoid/starter for inspection, possibly replace solenoid
- Already booked appt with mechanic from the marina for assistance.
Thanks for your time and appreciate any input!
Thanks
Donc
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