autoarcheologist
Seaman Apprentice
- Joined
- Apr 23, 2014
- Messages
- 46
I am getting ready to get our 68 Evinrude 100hp started this spring and wondering if anybody has any tips for a quick carb cleaning without removing the carb for a full clean?
The carb on the 68 100hp is a "series 2" I believe, which is basically four single bore carbs. It's relatively rare, which means a rebuild kit is over $200.
I am hoping to do a quick clean first, shoot out any gunk with spray cleaner, drain the lines, fill with fresh gas and see if it will start and run.
BACKGROUND:
At the end of 2014 the boat died while launching and wouldn't restart. I traced the problem to a bad ignition module, sent it back under warranty, and got a new one in the spring of 2015. That winter I drained and winterized the carbs and stabilized the gas in the tank.
In 2015 I couldn't get the motor to start, had a super busy summer, and never got much time to diagnose it further. I do know the module is giving me spark, the battery is new and good, but it wouldn't fire.
I'm thinking the gas that was left over the winter is going off, and now unfortunately it has been in the tank for over a year, and I was so frustrated with the boat I never winterized the motor properly last fall. So whatever gas was in the carbs has probably evaporated and left a mess.
So I probably need to pull the carbs, disassemble and clean them, and reassemble with new gaskets and seals. Hopefully the floats and needle valves are good and can be reused as they are incredibly pricey on this carb.
But I was wondering if anybody had any tricks to try before I dig into the carb. I have never rebuild one, so I'm a little gun shy about screwing it up.
Also, it ran great at high speed, but didn't like to start and had a rough idle. So it probably needs some idle adjustments after a good clean.
I really hope to have the boat on the water again this summer.
Thanks!
Ian
1968 Evinrude 100hp
1968 Reinell 18'.
The carb on the 68 100hp is a "series 2" I believe, which is basically four single bore carbs. It's relatively rare, which means a rebuild kit is over $200.
I am hoping to do a quick clean first, shoot out any gunk with spray cleaner, drain the lines, fill with fresh gas and see if it will start and run.
BACKGROUND:
At the end of 2014 the boat died while launching and wouldn't restart. I traced the problem to a bad ignition module, sent it back under warranty, and got a new one in the spring of 2015. That winter I drained and winterized the carbs and stabilized the gas in the tank.
In 2015 I couldn't get the motor to start, had a super busy summer, and never got much time to diagnose it further. I do know the module is giving me spark, the battery is new and good, but it wouldn't fire.
I'm thinking the gas that was left over the winter is going off, and now unfortunately it has been in the tank for over a year, and I was so frustrated with the boat I never winterized the motor properly last fall. So whatever gas was in the carbs has probably evaporated and left a mess.
So I probably need to pull the carbs, disassemble and clean them, and reassemble with new gaskets and seals. Hopefully the floats and needle valves are good and can be reused as they are incredibly pricey on this carb.
But I was wondering if anybody had any tricks to try before I dig into the carb. I have never rebuild one, so I'm a little gun shy about screwing it up.
Also, it ran great at high speed, but didn't like to start and had a rough idle. So it probably needs some idle adjustments after a good clean.
I really hope to have the boat on the water again this summer.
Thanks!
Ian
1968 Evinrude 100hp
1968 Reinell 18'.