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98 Speedster No Start

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Jnz

Jnz

Active Member
I picked up this boat as a project both engines were dissembled when purchased so I do not know the last time the boat ran. Both motors were completely redone with fresh parts bottom and top end. Everything is now assembled and I tried to finally start the motors. I found that the beeps when trying to start it were the neutral safety and though I was in the clear. Both motors crank, but neither start. One when choking it and cranking it over will sputter as if it were going to start, but does not. The other has a solid crank and no sputter or sound as if it were going to start. I was hoping to find a thread that'd give me a suggestion list on this boat, but didn't find much. Any suggestions on were to start and what direction to go?
 
Do you have spark? put a little premix down the spark plug holes, the put it back together and see if she'll light up. Is there fuel in the filters? Pulse lines hooked up from the case to the fuel pumps?
 
like he said, mix some gas in a spray bottle, but I would spray it in to the flame arrestor screens. and use a spark tester.
 
Tinkering with this today. Starting battery volts is 12.9. Went over to the freight and bought a spark tester and verified spark on all 4 wires.

I guess that puts me on to the fuel section. Everything is hooked up, I replaced the fuel lines and carbs were rebuilt with new filters and diaphragms. How much fuel is generally in the filters? Here is a picture of each filter.

Engine that sputters for a fee seconds
136.jpg


Engine that just cranks
137.jpg


I will attempt pre mix down the cylinders now and report back.
 
The Challenger I did didn't have them full either but they were a much narrower filter so it had more gas in it. Did you replace the fuel pumps? they are divorced from the carbs so you can't get a rebuild kit for them and have you gone through the carbs?
 
The boat actually didn't come with the fuel pumps so I i got them off a guy on ebay who said they came off a running boat. Aside from that I did nothing, but bolt them up. Carbs I did rebuilds on with fresh parts.
 
Actually come to think of it. One fuel pump came with the boat and one was from a guy on ebay. So it's odd that both would have the same issue.
 
Any advice on what I can check? Any way to verify the external fuel pumps work? I'm guessing I can't have anything hooked up wrong given I have some fuel in the filters.
 
Jnz said:
Any advice on what I can check? Any way to verify the external fuel pumps work? I'm guessing I can't have anything hooked up wrong given I have some fuel in the filters.
Click to expand...

Procedures are in the manual to test your fuel pumps, you have think outside the box just a little bit to solve your filter issue. They are basically 1/4 full of fuel and rest is air you didn't get out of there when installed. Take the hose loose from the pump inlet and raise it up as high as you can get it, hook your vacuum pump and recovery cannister up and pull that line full of fuel and get the air out of your filter so it's completely primed full of fuel.

At some point you're going to need that filter media working in the area that's air filled or they will just stop flowing fuel completely.
 
Hf has a brake bleeding contraption that might be nice to pull on that fuel line.
I have a rig i bought from hydro turf i think.
 
grinditout said:
Hf has a brake bleeding contraption that might be nice to pull on that fuel line.
I have a rig i bought from hydro turf i think.
Click to expand...

They have Mity-Vacs with recovery cannisters and fittings to check for leaks there, that's what he needs. If you can't pull the filter clear full of fuel then you know your drawing in air somewhere and have to find the leak.
 
So your thinking it's a prime issue? I've choked while cranking and got it to fill somewhat as you see, but on the starboard side it seems to stop pulling at some point and the sputtering uses all gas in the filter without replenishing. The port side does pull a little fuel in just not as much and doesn't want to start.
 
Jnz said:
So your thinking it's a prime issue? I've choked while cranking and got it to fill somewhat as you see, but on the starboard side it seems to stop pulling at some point and the sputtering uses all gas in the filter without replenishing. The port side does pull a little fuel in just not as much and doesn't want to start.
Click to expand...

I think you need to vacuum check every fuel line in the boat and selector valve for leaks and test your pumps, anything else is just guessing at this point but you have a problem(s) somewhere and need to find it.
 
I'll take a look at the pumps and see if I can verify there working. The fuel lines are new and I used all ss worm clamps, but I'll see if I can't get a hold of a vacuum tester to check. No selector so that eliminates that right away.
 
That's a good start not having the selector, if you find your pumps are bad (thats likely your issue) Mikuni has a nice high volume universal pump that's impulse driven you can use to run the carbs. Just route one of the outlets to the mag carb and the other to the pto carb and you'll have all the fuel you need. Kits are available to rebuild these if ever needed.

Best deal I can find on those pumps are here: http://www.powersportsuperstore.com...et-High-Volume-DF62-p/4459638.htm?Click=35177
 
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I would say put a new one or two on, they look just like the ones used on a briggs v-twin cant say for sure, i have two coming off this week, but i will probably sell them with the brackets.
 
Jnz said:
Any info on testing the external pump? Manual doesn't show anything on it.
Click to expand...
~It's listed right in section 5 of the fuel system.

Pressurize the diaphragm to 4 psi (from the pulse nipple), it needs to hold for 10 seconds or it's junk.

Check the fuel pump valves by connecting a piece of hose to the inlet nipple and apply pressure and vacuum, the inlet valve should release with pressure and hold under vacuum.

Same procedure at the outlet nipple, the outlet valve should hold with pressure and release under vacuum.
 
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Got the mity vac and I flipped the fuel filters upside down and was able to pull the filters full of fuel. Filters full of fuel neither engine would start off off just that. Fuel pumps seem to hold pressure, but given should I test anything else or just pull the trigger on the above fuel pumps?
 
Jnz said:
Got the mity vac and I flipped the fuel filters upside down and was able to pull the filters full of fuel. Filters full of fuel neither engine would start off off just that. Fuel pumps seem to hold pressure, but given should I test anything else or just pull the trigger on the above fuel pumps?
Click to expand...

It's not enough that they just hold pressure, they need to hold/ release vacuum at the right locations also. Once you get that done refer to the tank testing procedure in the manual for checking the vent that allows the tank to regulate pressure and vacuum if it's not opening properly the pumps wont work.
 
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