74 chrysler 45hp not getting top speed

[Nightracer]

Hi i have a 74 chrysler 45hp it run good idles good starts good but in gear will not get top end. It will in neutral it will rev up nice the butterfly opens right up can anyone help

 

[82rude]

Re: 74 chrysler 45hp not getting top speed

baring a mech problem you might have a spun prop.in gear will it rev but not give you any speed or very little?

 

[steelespike]

Re: 74 chrysler 45hp not getting top speed

Welcome,this is the prop forum.
Are you thinking you need a different prop?If your looking for motor help post in the Chrysler/Force forum.
Look for the big red thread starter tab.
Some things to check,Be sure its running on both cylinders. You wouldn't be the first to not realize your on one cylinder except for the lack of power.Most motors respond well in neutral.
Don't rev over 1500 in neutral ,you could trigger a runaway.
Be sure the fuel system is l clean from tank to carb.
Try to get a factory service manual.Uninformed trouble shooting of the ignition could damage it.