V/P AQ271C questions

[discotu]

I was given a boat that has this engine and have a few questions. It has been sitting for a couple 2-3 years so first think i did was replace the battery and put some gas in her. Engine turned over and i pumped the throttle a bit to pump the gas but couldn't get the gas to flow. I put in a new fuel filter so i know that's not restricting it. Is it possible that the pump needs to be serviced?

secondly, in the process of turning the engine over a few times, the starter failed. I removed it and looks like the brushes and contacts on the rotor are pretty corroded. what would be the best option? rebuild, OEM, aftermarket(ebay)? I know, i know...you get what you pay for...but are the aftermarket units okay?

thanks in advance for all your help!

 

[TowRoper]

Re: V/P AQ271C questions

i would check fuel flow at the carb inlet and pressure check it too your carb may be filled with corrosion and need rebuilding and i also would rebuild the existing starter if it cant just be cleaned up and ofcorse the fuel pump may need replaced too if the flow is to low or not there at all.

 

[Maclin]

Re: V/P AQ271C questions

The Holley carbs on those have some rubber parts inside that do not "sit" well for long periods of time. I am talking about the power valve and accelerator pump diaphragm. I would recommend a carb rebuild no matter what the actual problem is.

It could be the fuel pump. If it has the correct one on it and it is bad then look for gasoline flowing up a clear (or slightly yellowed!) small hose that goes from the pump to the flame arrestor above the carb. If that is happening then the pump diaphragms are definitely compromised and time for a new one. If that is not happening it does not necessarily mean the pump is functioning, but fuel pumps can be tested, so do not just throw a new one at it yet.

It could be problems with the pickup inside the tank, or any of the plumbing or components from there to the fuel pump.

The fuel filter will be the water separating cannister type that looks like an oil filter. Take it off and dump the contents into a clear vessel to see how much comes out and what condition it is in. Low volume means fuel delivery problems. The clear vessel also lets you see what you are trying to pump up to the carb.

 

[discotu]

Re: V/P AQ271C questions

no fuel going up the "clear" yellow tubing and the fuel filter was less than half full when i checked. can i just disconnect the main fuel line from the pump and blow through it to see if there are any obstructions to the tank?

If it's the fuel pump, can it be rebuilt or do i need to purchase a new one?

carb rebuild was also on my "to-do"list. Would you happen to have a ref number for a rebuild kit from a local auto parts shop?

lastly, can i get away with a aftermarket starter? i want to limit time and money spent on this project. I swore to my wife that it was worth it

thanks again for all your help!

 

[Maclin]

Re: V/P AQ271C questions

I would have the starter rebuilt if you have good shops like that in your area. That is usually cheaper than an OEM unit and more reliable than aftermarket.

The fuel pump is not renewable at home, so you would need to buy a new one.

There are some troubleshooting tips up in the stickeys at the top of this forum. One of them should be how to test the fuel pump with a vacuum gauge. Read thru those first.

Regarding blowing back thru the pickup, that may dislodge something and can even blow the sock type filter off of the pickup. It would be best to remove the pickup thru the top of the tank and inspect. There may be an anti-siphon valve that the fuel filter hose connects to at the tank, it may be not up to snuff as well and causing suction problems.

You could remove the fuel filter intake hose at the filter and cobble in a siphoning hand pump and see if the hand pump can pull fuel out of the tank up to it.

Another option is to see if the fuel pump can pull fuel thru the filter from a different fuel tank by removing the hose at the tank and putting it into a small fuel vessel like an outboard tank.

Keep in mind that some of these ideas involving removing fuel lines are dangerous shortcuts, watch all open electrical hotspots, take all precautions and have a lot of shop towels ready.

I may be able to find the remnants of the automotive kit I used for the carb and find a number. You will have to buy the power valve separately as the one in the automotive kit will be too high of a rated value, like 6.5 or 8.5. Your carb calls for a 2.5, a 3.5 will work and you can usually get those at a Holley carb parts shop.