50hp thunderbolt 500

[bighoss24]

what is the best way to clean out the carbs with out taking them off
it runs and will push my boat about 15 now but if i pump the bulb or spay carb cleaner in it it will get up to 25 mph witch is about the max for the 10 p prop i think any info will help
and save me money like 250 bucks
any info and help will be good

 

[bradw18]

Re: 50hp thunderbolt 500

my boat does the same thing same motor even but when i spray carb clean in it it dies your running lean and im running rich what is the 250 for?

 

[Scott Kirkman]

Re: 50hp thunderbolt 500

Get a manual, get a carb kit, and take them off and do it right. It's not that hard, and the difference it makes is immense.

 

[bighoss24]

Re: 50hp thunderbolt 500

the 250 is how much it would cost if i took it some were
i can fix almost any thing there is just a lot of stuff in front of them as in wires
but they aint hard to get off

 

[Faztbullet]

Re: 50hp thunderbolt 500

Please quit running it before you damage it and it costs more than $250 to repair, if it is not getting enough fuel its not getting enough lubrication plus carb cleaner & starting fulid are a no no on a running engine(no lube)

 

[hotrod53]

Re: 50hp thunderbolt 500

Removing the carbs and doing it yourself is not a big deal. There are a couple of need to knows before you do it to make it easier. My '77 500 Thunderbolt with Tillotson carbs required me to remove the starter (4 bolts), twist the plastic linkage that connects the choke and it will come right off, remove the top carb first, and try a couple of wrenches on the inside carb bolts, some work, some won't, you need to get the right angle on the wrench and they are not all the same. I tried 3 wrenches before I found the right one. You will be unsuccessful doing the job without removing it, that's a waste of time. Buy new carb kits and fuel pump kits, they're pretty cheap. If you have Tillotsons with the blue fuel inlets, but new ones, you'll never get them to stop leaking if they are old, they're only $5 each.

 

[merc850]

Re: 50hp thunderbolt 500

If your motor has these carbs note the filter screen. I took mine out because there is a filter near the fuel pump and I keep my fuel system clean.