93 voyager

[Texastoon]

I have 93 voyager, 20 ft. fisher. Can anyone tell me if it has a filter in the gas tank. The boat sat up for two years before i got my hands on it and will idle fine, but when put under a load out on the water it won't make it over 2500 rpm and sluggish at that. Revs up in neutral fine. The filter on the motor is very clean. Makes me think there could be a filter in the on board tank.
Just thought I would ask before I start taking things apart. Looks like some of the interior will have to me removed.
Thanks

 

[5150abf]

Re: 93 voyager

What engine, year and model?

I would clean the carbs before I tore the gas tank apart, alot more likely that you have crap clogging a jet.

And FYI, never run an engine above 1500 rpm without a load on it, very hard on them.

 

[Texastoon]

Re: 93 voyager

It has a 2001 year model, Tohatsu 70c. It's not original to this boat.
Is there a way of cleaning these carbs without a total rebuild?
Thanks

 

[EGlideRider]

Re: 93 voyager

I have never heard of a filter in the tank.

I assume you have fresh fuel in the tank.

Pick up some Seafoam from an auto supply store and follow the directions for 'shocking' the engine. This is some super stuff that I use regularly in all of my engines.

You may also consider rebuilding the carbs. They are probably in need of a rebuild now, but if not, it won't be long.

 

[bill and doris]

Re: 93 voyager

Everytime I have had a carb plug up because of my failing to properly store the boat, cleaner in the fuel never worked. Mainly because the carb isn't getting fuel through the jets. If there is a drain on the bowls you can try removing and spray a carb cleaner up through there. I have tried pulling the adjustments out and spraying cleaner in there and also pulling the fuel line off of the carb and spraying cleaner in that way. Most of the time these were less than totally sucessful. Removal and cleaning usually worked best.

 

[Hunky Dory]

Re: 93 voyager

"Tohatsu 70c...not original for this boat"

No way to tell from here but what do you know about the prop? Could be you are running an aggressive pitch prop. That would be like driving car uphill in top gear -- won't accelerate because it is not in powerband.

 

[EGlideRider]

Re: 93 voyager

"Tohatsu 70c...not original for this boat"

No way to tell from here but what do you know about the prop? Could be you are running an aggressive pitch prop. That would be like driving car uphill in top gear -- won't accelerate because it is not in powerband.

I doubt seriously if you are overpropped to the point that you can only get 2500 rpm's.

 

[Texastoon]

Re: 93 voyager

The prop is a 15 pitch that has a 13 3/4" dia.
Think I'm going to buy a small tank and run it direct to the motor for a test.
I guess if that cures it I will know I need to get into the on board tank.
I can also seafoam/decarb the motor off the small tank.
Looking at the carb kits on http://www.tohatsu-nissan-parts.com/
Thanks for all the help, will repost when I get it running correctly.

 

[EGlideRider]

Re: 93 voyager

A 15 pitch prop would certainly account for that drastic RPM drop.

In fact the 15 is about right for that boat.

 

[boatmor]

Re: 93 voyager

I have taken the gas hose loose from the fitting at the motor and poured sea foam into the gas line, reattached the gas line and cranked the engine to try to get the sea foam into the system and let it set for a while. I don't know if it helped or not but think that it should.
You should be able to remove your gas tank without too much trouble. Drain it, put some water in it and slosh it around a little, dump that out and fill with hot soapy water and really slosh that around. Dump that and fill with cold water and let it run over. Cold water tends to break up the soap foam better than hot. If you position the tank right sometimes you can get almost all the soap out of it with the over flow.
I really don't think that it makes any difference if you get all the soap or not. Then get a wire, I use a coat hanger and hook a rag in it and sop up the residual water from the tank. I use paper towels a lot but you have to be careful not to leave any in the tank. Then put an inline filter in your gas line. I had trouble draining a plastic tank so I drilled a very small hole in a top corner of the tank, turned it upside down, drained it completely then put a screw through the hole. It worked fine. Make sure the screw is a tight fit.

 

[EGlideRider]

Re: 93 voyager

A 15 pitch prop would certainly account for that drastic RPM drop.

In fact the 15 is about right for that boat.

Opps. Should read "A 15 pitch prop would certainlly NOT account for that drastic RPM drop."