1975 chrysler 90hp hard to start

[72invader]

I have a 1975 Chysler 90 hp and in Dec I took it out and it ran great no problems.I took the same boat boat out in late Jan and it was going good till I hit full thottle and it started to sputter, and then it died, Started it back up and did the same thing at full throttle so I limped it back to shore and put new fuel in and now it is real hard to start, I have to to open up the throttle almost Half way by hand to get it to start. Once I let off the throttle it dies again. Carbs were rebuilt in Aug of last year and this is the first problem I have had with motor.

 

[DJ]

Re: 1975 chrysler 90hp hard to start

Invader,<br /><br />Does your fuel primer bulb remain hard?<br /><br />Put some 50:1 mix in a spray bottle and squirt it in the carb throats while cranking it. If that helps, you have a fuel delivery problem.<br /><br />Could be:<br /><br />Fuel filter/screen.<br /><br />Fuel pump.<br /><br />Gummed up carbs.<br /><br />Bad fuel.

 

[72invader]

Re: 1975 chrysler 90hp hard to start

Thanks for the info. yes the primer bulb gets hard. and I will try that spray bottle out this week end.