Fuel problem, please help. - Page 4

spareparts · #31 08-03-2010, 10:21 PM

as far as a service on the four strokes, your looking close to $300 in filters alone(and the gaskets to seal the vst), here lately it seems if you don't do all of them, your right back at the beginning. I swear, I've never seen so many fuel related issues, I had more injectors cleaned in the last 6 months than I had in the last 24 years(yes I know, they weren't fuel injected back then)

THEFERMANATOR · #32 08-04-2010, 12:22 AM

I didn't do the VST as he has good pre-filters on his engine. Just the basic annual was all I did. The parts came out to about $200 of that though.

Blue_Runner · #33 08-04-2010, 07:46 AM

Phes, cool deal....I would love to change all my fuel lines before it becomes a problem.

Ferm - I'm so used to B.O.A.T (bust out another thousand) every time I have a problem that the $200 seems like chump change....he did lubricate my trailer jack and coupler. Also sprayed down the engine with 656 lube. He said it is a good idea especially if run in saltwater because eventually things will start sticking.

Spare - I would love to have a 4 stroke. The fuel savings would counter the maintenance costs but it would take a long time to justify the price difference from what I paid for my 2 stroke. I would get at least 1 more mpg. I get 2 - 2.5 now. With a 4 I should get anywhere b/t 3 - 4 mpg. Would add a little more weight on my girls donk-a-donk though. Which could make the scuppers angry.

MJ - OUCH! But had to be done! Been there done that...bought 2 t-shirts!

RW - thanks!

macojoe · #34 08-04-2010, 10:34 AM

I was told, Right or Wrong?? that the VST system should be done every year if I go 100 hours or every 2 years if I under a 100 hours a year.

or the fuel pump can die and the mariner gets $900 for a new one! They charge $200 to do the VST serves and that also is to clean the lines and injectors and VST tank.

I will do every 2 years and hope for the best.

Do you guy remember when I could not afford a use crap motor!

Blue_Runner · #35 08-04-2010, 12:58 PM

I seem to recall a certain fiasco concerning a "used crap motor" that I'm sure both you and I would rather forget.

#36 08-07-2010, 12:57 PM

Try this troubleshooting procedure. Disconnect the fuel supply hose at the engine. Connect it to a clear plastic hose then connect the other end of the clear hose to the engine. Start the engine and look for signs of air bubbles indicating that you are sucking air somewhere vice solid gas. I used this procedure before to find the same problem. My problem was the clamp holding the vaccum hose to the pulse limiter on the crankcase had come loose. I did not have enough vaccum at high speed to suck enough gas to the fuel pump(in my case not enougn vaccum to the VRO) when trying to get on plane. If you see air bubbles then troubleshoot from there. Also try an external tuel test tank also with a clear hose to eliminate your built in fuel tank and hoses an a source of the problem.

wwatterson
1987 Wellcraft V20 Fisherman with original Sea Drive

spareparts · #37 08-07-2010, 08:53 PM

used to be, you hardly every went into the VST, now it seems like an anual occurance. I've all kinds of rumors about whats causing teh trash and why it gets past teh filters, best thing to do is runa good water separating filter, and change it often. I've seen some shops install a suzuki high pressure filter between the vst and the injector rail, it seems to help

THEFERMANATOR · #38 08-07-2010, 09:01 PM

Quote:

Originally Posted by wwatterson

Try this troubleshooting procedure. Disconnect the fuel supply hose at the engine. Connect it to a clear plastic hose then connect the other end of the clear hose to the engine. Start the engine and look for signs of air bubbles indicating that you are sucking air somewhere vice solid gas. I used this procedure before to find the same problem. My problem was the clamp holding the vaccum hose to the pulse limiter on the crankcase had come loose. I did not have enough vaccum at high speed to suck enough gas to the fuel pump(in my case not enougn vaccum to the VRO) when trying to get on plane. If you see air bubbles then troubleshoot from there. Also try an external tuel test tank also with a clear hose to eliminate your built in fuel tank and hoses an a source of the problem.

wwatterson
1987 Wellcraft V20 Fisherman with original Sea Drive

Using clear hose to look for air bubbles isn't the best test anymore. With E-10 fuel it can generate air bubbles in the fuel on a hot day now.