- 2001 Sport Nautique by Correct Craft
- 5.8L PCM GT-40 Multiport Fuel Injected, ford 351
- BLU/BGE, 21.5 ft long
- Hull: CTC14085H001
- Engine serial #: 410231 (PLP PRR12 M 410231 1030630)
Problem Description:
- This is difficult to troubleshoot because itrequires running the engine until it gets up to operating temperature and theengine is fully warmed up (with the engine compartment closed).
- After the boat warms up to normal 160F operatingtemperature, it has problems re-starting if I turn off the engine. This got progressively worse over the past 2yrs, and now it happens every time. Itwill rarely restart, but if it catches will typically sputter out.
- When the engine is hot, and off, and I try torestart - I noticed that the fuel pump primer relays sometimes intermittentlychatter (chic-chic-chic-chic….chic-chic….chic-chic-chic-chic-chic…) after Ipush the “start” button once to turn the electrical on. This causes the fuel pump to turn on/offintermittently as a result. I then pushthe stop button to stop this action. Wait a bit and usually that condition goes away after its been cooledoff. After cooled off, pushing the“start” button once will allow the fuel pump to turn on for about 4 seconds(which is normal), then pushing the “start” button a second time turns theengine over to run.
- Commanding more throttle when this situationexists doesn’t seem to help it at all
- There are times where I pulled the water filter,emptied the gunk out, then re-installed it – it will restart. Probably coincidental because it allows it tocool off.
- One time I tried to pull the emergency cut-offswitch and it seemed to have an issue with running. It could be that there is a bad contact onthis switch? But after I played aroundwith the switch for a while, it didn’t seem to have an effect. For this reason, Im suspecting that theproblem is more electrical. Possiblywith a sensor or with the engine control module. If you notice, the right dash gauge is notdisplaying (probably just the display LED’s went bad about 5-7 yrs back), maybethat has an effect on it, but likely not.
- Typically, if I turn off the engine, I raise theengine compartment and wait for it to cool down to below 140F.
- Once the temperature gauge goes to 140F orbelow, it seems to start back up fine.
- Cold start has no problems starting at all, infact it starts cold every time with no sputtering.
- If I keep the engine running, there are noproblems and it keeps running.
- The engine performs beautifully when itsrunning.
Whats been tried:
- Chicago Boat House marine shop tried totroubleshoot. They charged $380 and onlyreplaced the negative cable to the battery, they thought it was fixed but itdidn’t improve any.
- I replaced both relays shown in picture to theright (12 V HELLA relay 4RD 960 388-31)
- I replaced the distributor cap, spark plugs,spark plug wires.
- I measured one of the coolant sensors, and itappeared to have the correct OHM reading when cool and when hot.
What has not been tried:
- I have not performed a full engine tune-up sincepurchased
- The fuel filter has not been replaced
- I have not measured the fuel pressure or airtemperature sensor.
- Its not clear if Im losing a ground to the ECM?
- I have not traced all the grounds because Iassumed that Chicago Boat House did this….
any ideas, thanks.
- This is difficult to troubleshoot because itrequires running the engine until it gets up to operating temperature and theengine is fully warmed up (with the engine compartment closed).