Hard starting after sitting a week

[cschadow]

Hello Volvo forum
I have a 2000 Volvo Penta 4.3 stern drive in a Glastron I/O. I do not have electronic ignition. The engine runs and performs great. My only issue is it is difficult to start after it sits for a week. Up here in MN we are weekend cabin goers. So every weekend I am struggling to start up the boat the first time. Once going for the weekend it keeps starting easy for the rest of the weekend, it’s only after it sits for the week that I struggle. On the first start of the weekend I pump the throttle 5-6 times (used to be 1-2 times) it grinds for 10 seconds, doesn’t start. Typically, during the next 10 second effort it starts. However, it does always start without any further heroics (like starting fluid). Is there anything on the easier side I can try to help the issue before I tow it into the shop? I have a fair amount of common sense and could probably replace parts, but if it gets into disassembling the carburetor, that job it not for me. FYI, I have tried various fuel treatments in the gas.

Any help would be appreciated.

 

[RicardoMarine]

............................

Hello Volvo forum
I have a 2000 Volvo Penta 4.3 stern drive in a Glastron I/O. I do not have electronic ignition.
Check again...... I believe that you do have an EST system.

The engine runs and performs great. My only issue is it is difficult to start after it sits for a week. Up here in MN we are weekend cabin goers. So every weekend I am struggling to start up the boat the first time. Once going for the weekend it keeps starting easy for the rest of the weekend, it’s only after it sits for the week that I struggle. On the first start of the weekend I pump the throttle 5-6 times (used to be 1-2 times) it grinds for 10 seconds, doesn’t start. Typically, during the next 10 second effort it starts. However, it does always start without any further heroics (like starting fluid). Is there anything on the easier side I can try to help the issue before I tow it into the shop? I have a fair amount of common sense and could probably replace parts, but if it gets into disassembling the carburetor, that job it not for me. FYI, I have tried various fuel treatments in the gas.

My guess would be that the carburetor is allowing the fuel to evaporate between usages.

Your 2000 Volvo Penta 4.3L should be equipped with an electric fuel pump.
Find an OEM wiring schematic, and locate the fuel pump's relay.
Install a "Momentary" switch at the helm. (must be a momentary switch in order to NOT violate USCG regs!!!!)
Run a new circuit from this switch to the triggering side of the fuel pump's relay.
Before trying to start the engine, operate this momentary switch for 10 seconds or so.

This will pre-fill the carburetor's float bowl, make for faster starts, and will extend the life of your starter motor and battery!


Any help would be appreciated.