88 marathon power loss

Old drifter · 06-18-2020, 04:12 AM

Hi y’all
I have an 88 marathon (robin 244) that I was able to find a new muffler for. When I put it on its sluggish and doesn’t have enough power to move for about 15-20 seconds, then it powers up and runs like normal. Tried it without the muffler and no issues. Any thoughts?

It is the correct muffler, good compression @110, plenty of spark, fuel pump good...

cart around · 06-18-2020, 05:10 AM

It has to be a used muffler. New ones haven't been available for years. Have you burned it out to clean out any old residue?

Have you checked the air filter, and intake? It has a breathing restriction somewhere.

I like to use Seafoam to clean things out too.

Old drifter · 06-18-2020, 10:48 AM

Brand new mufler..small little shop in Western Canada, been sitting on a shelf for years but never been even mounted..I was in shock too.
Almost fell over when the said they would let me have it for $190...asked if they had more but sadly no.

Put on new air filter and tried with out. Wondering if the exhaust port is gummed up. Runs like a rocket with no mufler but a bit loud for the campground

06-18-2020, 04:12 AM	#1
Old drifter Not Yet Wild Join Date: Dec 2019 Posts: 4	88 marathon power loss Hi y’all I have an 88 marathon (robin 244) that I was able to find a new muffler for. When I put it on its sluggish and doesn’t have enough power to move for about 15-20 seconds, then it powers up and runs like normal. Tried it without the muffler and no issues. Any thoughts? It is the correct muffler, good compression @110, plenty of spark, fuel pump good...
Old drifter Not Yet Wild Join Date: Dec 2019 Posts: 4

06-18-2020, 05:10 AM	#2
cart around Test before replacing Join Date: Aug 2013 Location: Ohio side of the Pennsylvania border. Posts: 3,495	Re: 88 marathon power loss It has to be a used muffler. New ones haven't been available for years. Have you burned it out to clean out any old residue? Have you checked the air filter, and intake? It has a breathing restriction somewhere. I like to use Seafoam to clean things out too.

06-18-2020, 10:48 AM	#3
Old drifter Not Yet Wild Join Date: Dec 2019 Posts: 4	Re: 88 marathon power loss Brand new mufler..small little shop in Western Canada, been sitting on a shelf for years but never been even mounted..I was in shock too. Almost fell over when the said they would let me have it for $190...asked if they had more but sadly no. Put on new air filter and tried with out. Wondering if the exhaust port is gummed up. Runs like a rocket with no mufler but a bit loud for the campground
Old drifter Not Yet Wild Join Date: Dec 2019 Posts: 4

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